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"Thanks to the following for transcribing the 1880 Montana 
Census for MtGenWeb:  Ellen Rae Thiel, Betty Distad, Suzanne 
Andrews, and to Sherry Holthe.  Also, our thanks to Cleve 
Kimmel, who compiled the transcriptions into an A-Z alphabet."

"If you have Microsoft Excel  on your computer, you can view this 
1880 census index in more detail at
http://www.rootsweb.com/~mtyellow/census1880/census-list.htm "




Last Name     First NamePage #      Line #    Age      County     Township              
O Brien       James     225-D       156       57       Gallatin   Middle Creek Valley
O Brien       John      224-B       151       22       Gallatin   West Gallatin Valley
O Brien       Thomas    225-D       157       50       Gallatin   Middle Creek Valley
O Dea         John      399D        509       22       Meagher    SMITH RIVER VALLEY
O Donell      William   396A        294       31       Meagher    Belt Mountains & Smith River Valley
O Farrell     Bernard   236A        220       29       Gallatin   Madison Valley
O HERON       PATRICK   102D        135       45       Dawson     District #9
O Herron      George     226-A      160       9M       Gallatin   East Gallatin Valley
O Herron      Katy       226-A      160       16       Gallatin   East Gallatin Valley
O Herron      William    226-A      160       22       Gallatin   East Gallatin Valley
Oaks          Etna      409C        1130      11       Meagher    Oregan & adjoining Gulches
Oaks          Jessie P. 409C        1131      9        Meagher    Oregan & adjoining Gulches
Oaks          John      409C        1126      48       Meagher    Oregan & adjoining Gulches
Oaks          Mary A.   409C        1127      37       Meagher    Oregan & adjoining Gulches
Oaks          Wallace   409C        1128      19       Meagher    Oregan & adjoining Gulches
Oaks          Waveryly  409C        1129      17       Meagher    Oregan & adjoining Gulches
Oates         John      25B         800       31       Beaverhead Lion's City                                                                                          n/a
Oates         John      18                    31       Beaverhead                                                                                                      Lion's City
Oates         Thomas    25B         820       36       Beaverhead Lion's City                                                                                          n/a
Oates         Thomas    18                    36       Beaverhead                                                                                                      Lion's City
O'Bannon      Annie     181B        2748      2        Deer Lodge                                                                                                      Deer Lodge (3)
O'Bannon      Fannie C. 181B        2746      27       Deer Lodge                                                                                                      Deer Lodge (3)
O'Bannon      Ida B.    181B        2747      4        Deer Lodge                                                                                                      Deer Lodge (3)
O'Bannon      Marcus    182C        2749      8M       Deer Lodge                                                                                                      Deer Lodge (3)
O'Bannon      O.B.      181B        2745      46       Deer Lodge                                                                                                      Deer Lodge (3)
O'Bannon      Sallie B. 180C        2749A     31       Deer Lodge Missing Entries                                                                                      Deer Lodge
O'Boyle       James     157A        432G      29       Deer Lodge Deer Lodge Valley
OBRIAN        JOHN      316-A       4348A     29       Lewis & ClaPRICKLY PEAR VALLEY
O'Brian       Martin    355-B       48        30       Madison    Poney                                                                                                n/a
OBRIEN        JOHN      65D         2514      38       Choteau    Highwood Creek
OBRIEN        MARY      65D         2515      26       Choteau    Highwood Creek
OBRIEN        MARY      65D         2516      4        Choteau    Highwood Creek
O'Brien       David     355-B       8         41       Madison    Poney                                                                                                n/a
O'Brien       John D.   355-B       10        3        Madison    Poney                                                                                                n/a
O'Brien       Margaret  355-B       9         21       Madison    Poney                                                                                                n/a
O'Brien       Mary C.   355-B       11        2        Madison    Poney                                                                                                n/a
O'Brien       Michael   380-A       2914      44       Madison    Alder Gulch                                                                                          n/a
O'BRIEN       MORGAN    47D         1585      22       Choteau    Sun River
O'Brien       Patrick   22D #2      519       26       Beaverhead Glendale                                                                                             n/a
O'Brien       William   179B        2513      45       Deer Lodge                                                                                                      Deer Lodge (3)
O'Brien       William   377-D       41        30       Madison    Ruby Valley (4)                                                                                      n/a
O'Brien       Wm.       183B        2907      39       Deer Lodge                                                                                                      Deer Lodge
O'BRIEN,      D.        238C        128       40       Jefferson  VICINITY OF PARK, NEAR BOULDER & BUTTE STAGE ROAD (BISON CREEK, TRIBUTARY OF THE BOULDER RIVER)
O'BRIEN,      J.        241B        465       27       Jefferson  WICKES & VICINITY & MOUNTAINS TO THE WEST
OBRINE        JOHN      101B        62        30       Dawson     District #9
Obrine        Thomas    194C        3942      27       Deer Lodge Vestal
O'BRINE       A. L.     69B         266       25       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
O'BRINE       JNO.       73B        585       48       Choteau    On the Missouri River
O'Brine       Thomas    193B        3886      22       Deer Lodge Vestal
O'BRINE       THOS.     69B         267       26       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
O'BRINE       WM.       69B         268       29       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
O'BRINE       WM. H.    69B         269       55       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
Ockerem       Jas.      15A         1307      29       Beaverhead Beaverhead River                                                                                     n/a
O'CONNEL      JOHN      323-B       4852      36       Lewis & ClaBelmont
O'CONNEL,     Ann       248C        1058      46       Jefferson  VICINITY OF STAGE ROAD SOUTH OF JEFFERSON CITY (BEAVERTOWN)
O'CONNEL,     C. J.     248C        1060      7        Jefferson  VICINITY OF STAGE ROAD SOUTH OF JEFFERSON CITY (BEAVERTOWN)
O'CONNEL,     J. F.     248C        1059      11       Jefferson  VICINITY OF STAGE ROAD SOUTH OF JEFFERSON CITY (BEAVERTOWN)
O'CONNEL,     J. R.     248D        1089      21       Jefferson  VILLAGE OF BOULDER & BON LELOR BASIN & VICINITY (UPPER BOULDER VALLEY)
O'CONNEL,     M. W.     248C        1057      51       Jefferson  VICINITY OF STAGE ROAD SOUTH OF JEFFERSON CITY (BEAVERTOWN)
O'CONNEL,     W. A. J.  248C        1061      5        Jefferson  VICINITY OF STAGE ROAD SOUTH OF JEFFERSON CITY (BEAVERTOWN)
Oconnell      Maurice   167A        1364      32       Deer Lodge Hasmarck
O'CONNELL               329-B       5328      20       Lewis & ClaPRICKLY PEAR VALLEY & MO. RIVERS
O'Conner      John      359-B       29        68       Madison    Silver Star                                                                                          n/a
O'Conner      T.        363-C       43        67       Madison    Iron Rod                                                                                             n/a
O'Connor      D.J.      181B        2703      26       Deer Lodge                                                                                                      Deer Lodge (3)
O'CONNOR      JNO.      69B         270       28       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
O'Connor      John      24D         746       50       Beaverhead Glendale                                                                                             n/a
O'CONNOR      Thomas    1                              Beaverhead                                                                                                      City of Dillon
O'CONNOR      THOS.     310-C       3825      32       Lewis & ClaPARK CITY
O'Conor       Henry     190D        3572      30       Deer Lodge North Bear & Hellgate Rivers
O'Day         James     378-A       17        59       Madison    Ruby Valley (4)                                                                                      n/a
Odell         Abraham   2D          181       44       Beaverhead Beaverhead River                                                                                     n/a
O'DONALD      JNO.      69B         271       27       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
O'Donnel      John      384-A       3277      24       Madison    Adobe Town                                                                                           n/a
O'Donnel      John      366-B       1623      52       Madison    Beaverhead Valley                                                                                    n/a
O'DONNEL,     M.        237A        49        36       Jefferson  VICINITY OF LITTLE BOULDER RIVER & BOULDER RIVER & CATARACT CREEK
Odonnell      Thos.     25A         760       24       Beaverhead Lion's City                                                                                          n/a
O'Donnell     Jas.      177A        2302      38       Deer Lodge                                                                                                      Deer Lodge (3)
O'Donnell     John      27A         973       17       Beaverhead Lion's City                                                                                          n/a
Oel           Rudolph   180C        2597      44       Deer Lodge                                                                                                      Deer Lodge (3)
Oeones        Owen      163A        966       47       Deer Lodge Philipsburg
Ofarrell      Edward    170C        1629      24       Deer Lodge Flent Creek Valley
O'Farrell     James     392A        16        50       Meagher    Confederate Gulch
OFERBECK,     Peter     258D        435       59       Jefferson  RADERSBURGH VICINITY
OFERLIA       FRANK     314-A       4124      20       Lewis & ClaPRICKLY PEAR VALLEY
Offinbach     Charles   236B        n/l       25       Gallatin   Willson Creek West Gallatin Valley
Ogara         Thomas    419B        1868      35       Meagher    Upper Judith Valley                                                                                  Yogo Gulch Mines
Ogden         James     187B        3275      46       Deer Lodge By Blackfoot
OGLE          L.        69B         272       28       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
OGLE          MARY E.   69B         273       9M       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
Oglesby       James H.  29B         1231      31       Beaverhead Trapper Gulch                                                                                        n/a
OGLESBY       JOHN      330-C       5331      23       Lewis & ClaBLUE CLOUD & HOLTER MILL
O'Grady       Jas.      174C        1980      45       Deer Lodge                                                                                                      Deer Lodge
O'GRADY       M.        69B         274       25       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
Ogreen        Andrew J. 22D #2      518       23       Beaverhead Glendale                                                                                             n/a
O'Hanley      Alex      177A        2278      32       Deer Lodge                                                                                                      Deer Lodge (3)
O'HANLON      THOMAS    71A         397       32       Choteau    Fort Belknap                                                                                         Fort Belknap
O'Harah       Roger     188D        3400      44       Deer Lodge Elk Creek
O'Hare        Patrick   355-B       49        36       Madison    Poney                                                                                                n/a
O'HERIN,      Mary      265B        960       35       Jefferson  BEDFORD & MISSOURI VALLEY
O'HERN        JOHN      34B         256       31       Choteau    Fort Benton                                                                                          n/a
Oherron       Martin    410B        1232      56       Meagher    Missouri River Valley
Oherron       William   410B        1233      23       Meagher    Missouri River Valley
OHLERKING     CHAS.     71A         415       24       Choteau    Fort Belknap                                                                                         Fort Belknap
OHLSEN        JOHN      40A         847       35       Choteau    Fort Benton                                                                                          n/a
O'KEEFE       JOHN      43D         1187      34       Choteau    Fort Benton                                                                                          n/a
O'KENNAN      AUG.      48A         1647      30       Choteau    Fort Benton                                                                                          n/a
OKERMAN       ANDREW    55D         2168      33       Choteau    Thonkin Creek
OKERMAN       AUGUST    55D         2170      20       Choteau    Thonkin Creek
OKERMAN       SIVERINA  55D         2169      30       Choteau    Thonkin Creek
Olary         James     3A          216       34       Beaverhead Beaverhead River                                                                                     n/a
Olauglin      Mortemere 190C        3519      50       Deer Lodge First Chance & Bear
Olden         Allen     431D        2742      28       Meagher    Musselshell Valley
OLDHAM        J. J.     330-C       5355      32       Lewis & ClaBLUE CLOUD & HOLTER MILL
Olds          L.B.      353-A       17        41       Madison    Red Bluff                                                                                            n/a
Olds          Rohesia   353-A       18        28       Madison    Red Bluff                                                                                            n/a
O'Leary       Con       408A        1021      25       Meagher    Oregan & adjoining Gulches
O'LEARY       John F.   2                              Beaverhead Bannack                                                                                              Bannack
OLESON        D.        324-D       4915      34       Lewis & ClaBelmont
OLESON        HALVER    59D         2296      28       Choteau    North Bank Upr Teton River
Oleson        Lars      173B        1922      42       Deer Lodge Deer Lodge & Valley
Oleson        Ole       173B        1924      6        Deer Lodge Deer Lodge & Valley
Olethoreson   Ole       366-A       1551      50       Madison    Beaverhead Valley                                                                                    n/a
Oley          Thomas    10B         822       24       Beaverhead Beaverhead River                                                                                     n/a
Olin          Cornelia  182D        2819      46       Deer Lodge                                                                                                      Deer Lodge (3)
OLIN          N. D.     320-D       4638      34       Lewis & ClaTEN MILE
Olin          Thomas J. 191A        3628      26       Deer Lodge Hellgate River & Little Blackfoot
OLINGER       HATTIE    45D         1361      8        Choteau    Fort Benton                                                                                          n/a
OLINGER       JULIA     43D         1185      3        Choteau    Fort Benton                                                                                          n/a
OLINGER       MINNIE    43D         1186      8M       Choteau    Fort Benton                                                                                          n/a
OLINGER       OSCAR I.  52A         1893      37       Choteau    Belt Creek                                                                                           n/a
OLINGER       PEGGY     43D         1184      35       Choteau    Fort Benton                                                                                          n/a
OLINGER       SUSAN     45D         1362      6        Choteau    Fort Benton                                                                                          n/a
OLINGER,      J. W.     239B        260       46       Jefferson  CATARACT & BASIN CREEKS (Rumley & Comet mines)
Oliver        C.F.      346D        18        12       Madison    District 27                                                                                          n/a
Oliver        Delos     17A         14        6        Beaverhead Big Hole                                                                                             n/a
Oliver        Denton    14C         1168      4M       Beaverhead Beaverhead River                                                                                     n/a
Oliver        Era       346D        24        2        Madison    District 27                                                                                          n/a
OLIVER        FRANK C.  324-D       4904      34       Lewis & ClaBelmont
Oliver        Fred      17A         12        10       Beaverhead Big Hole                                                                                             n/a
Oliver        James F.  346D        21        8        Madison    District 27                                                                                          n/a
Oliver        James F.  346D        16        35       Madison    District 27                                                                                          n/a
Oliver        John      346D        20        8        Madison    District 27                                                                                          n/a
Oliver        John A.   372-A       36        52       Madison    Ruby Valley (3)                                                                                      n/a
Oliver        Lilly     14C         1167      5        Beaverhead Beaverhead River                                                                                     n/a
Oliver        Martha    346D        17        28       Madison    District 27                                                                                          n/a
Oliver        Mary      346D        19        10       Madison    District 27                                                                                          n/a
Oliver        Matilda   14C         1166      28       Beaverhead Beaverhead River                                                                                     n/a
Oliver        Nan       17A         13        8        Beaverhead Big Hole                                                                                             n/a
Oliver        Nellie    346D        22        6        Madison    District 27                                                                                          n/a
Oliver        Wasson    14C         1165      38       Beaverhead Beaverhead River                                                                                     n/a
Oliver        Wm.       353-B       10        22       Madison    Red Bluff & Lewis                                                                                    n/a
Oliver        Wm.       346D        23        4        Madison    District 27                                                                                          n/a
Oliver        Wm. H.    17A         11        50       Beaverhead Big Hole                                                                                             n/a
Olo           John      12C         966       40       Beaverhead Beaverhead River                                                                                     n/a
Olsen         Jacob     426B        2324      45       Meagher    The Musselshell Valley
OLSEN         OLE       39C         739       29       Choteau    Fort Benton                                                                                          n/a
OLSEN,        H.        239A        235       30       Jefferson  CATARACT & BASIN CREEKS (TRIBUTARIES OF BOULDER RIVER & VICINITY
OLSEN,        Martin    268C        1132      19       Jefferson  Mountains
OLSON         ADOLPH K. 315-D       4231      28       Lewis & ClaPRICKLY PEAR VALLEY
Olson         Albert    378-A       44        8        Madison    Ruby Valley (4)                                                                                      n/a
Olson         Andrew    20C         309       49       Beaverhead Glendale                                                                                             n/a
Olson         Charles   378-A       42        47       Madison    Ruby Valley (4)                                                                                      n/a
Olson         Della     378-A       46        3        Madison    Ruby Valley (4)                                                                                      n/a
Olson         Emma      378-A       47        2        Madison    Ruby Valley (4)                                                                                      n/a
OLSON         GUS       324-D       4927      28       Lewis & ClaBelmont
Olson         John      378-A       45        7        Madison    Ruby Valley (4)                                                                                      n/a
Olson         Maria     378-A       43        25       Madison    Ruby Valley (4)                                                                                      n/a
Olson         Ole       14D         1222      19       Beaverhead Beaverhead River                                                                                     n/a
Olson         Ole       24D         732       33       Beaverhead Glendale                                                                                             n/a
OLSON                   323-B       4844      30       Lewis & ClaBelmont
OLSTED        OLE       42A         1044      31       Choteau    Fort Benton                                                                                          n/a
OLYER         WM. B.    69B         275       30       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
O'MARA        J.        326-D       5100      44       Lewis & ClaWHIPPERWILL GLOSTER
Omarr         John      398A        395       28       Meagher    Belt Mountains & Smith River Valley
Omarr         Katie     398A        396       23       Meagher    Belt Mountains & Smith River Valley
O'Meara       Isaac     374-A       49        20       Madison    Ruby Valley (3)                                                                                      n/a
OMEG,         J.        237A        21        25       Jefferson  VICINITY OF LITTLE BOULDER RIVER & BOULDER RIVER & CATARACT CREEK
O'MERA,       T.        247A        963       60       Jefferson  MITCHELL'S GULCH & VICINITY
O'Neal        Eugene    182C        2796      27       Deer Lodge                                                                                                      Deer Lodge (3)
ONEAL,        Charles   259B        546       25       Jefferson                                                                                                       RADERSBURGH
Oneil         Addie     165B        1226      10       Deer Lodge Philipsburg
Oneil         Barbara   179A        2455      33       Deer Lodge                                                                                                      Deer Lodge (3)
Oneil         H.W.      179A        2456      14       Deer Lodge                                                                                                      Deer Lodge (3)
Oneil         Hugh      165B        1225      12       Deer Lodge Philipsburg
Oneil         J.E.      179A        2458      6        Deer Lodge                                                                                                      Deer Lodge (3)
Oneil         James     6C          453       49       Beaverhead Beaverhead River                                                                                     n/a
Oneil         John      165B        1228      3        Deer Lodge Philipsburg
Oneil         John      179A        2454      39       Deer Lodge                                                                                                      Deer Lodge (3)
Oneil         Kate      12C         983       7        Beaverhead Beaverhead River                                                                                     n/a
Oneil         Lydia     165B        1227      8        Deer Lodge Philipsburg
Oneil         M.R.      179A        2457      11       Deer Lodge                                                                                                      Deer Lodge (3)
Oneil         Margrett  165B        1223      39       Deer Lodge Philipsburg
Oneil         Mary      165B        1224      15       Deer Lodge Philipsburg
Oneil         Mary      12C         982       25       Beaverhead Beaverhead River                                                                                     n/a
Oneil         Pat       12C         981       35       Beaverhead Beaverhead River                                                                                     n/a
Oneil         Patrick   162D        921       35       Deer Lodge                                                                                                      Pioneer City
O'Neil        Adda      25A         771       25       Beaverhead Lion's City                                                                                          n/a
O'Neil        Ella      25A         772       5        Beaverhead Lion's City                                                                                          n/a
O'Neil        Frankie   25A         773       3        Beaverhead Lion's City                                                                                          n/a
O'Neil        Hugh      180C        2573      47       Deer Lodge                                                                                                      Deer Lodge (3)
O'Neil        James     175A        2068      35       Deer Lodge Upper Deer Lodge Valley
O'Neil        John      189A        3431      45       Deer Lodge Elk & Bear
O'Neil        John      197A        4229      14       Deer Lodge                                                                                                      Blackfoot City
O'Neil        Nora      25A         774       1        Beaverhead Lion's City                                                                                          n/a
O'Neil        William   25A         770       29       Beaverhead Lion's City                                                                                          n/a
O'Neil        William   187B        3299      54       Deer Lodge By Blackfoot
ONEIL,        Elizabeth 268C        1120      21       Jefferson  Mountains
ONEIL,        Elizabeth 268C        1121      1        Jefferson  Mountains
ONEIL,        John W.   268C        1119      31       Jefferson  Mountains
O'Neil,       F. P.     246C        861       53       Jefferson  MOUNTAINS WEST OF CLANCY & BIG INDIAN CREEK, HOLMES GULCH & PRICKLEY PEAR CREEK
O'NEIL,       Henry     252B        113       28       Jefferson  VALLEY & MOUNTAINS
O'NEIL,       Henry     249B        1165      32       Jefferson  VILLAGE OF BOULDER & BOULDER BASIN & VICINITY (UPPER BOULDER VALLEY)
ONEILL        WILLIAM   38B         683       39       Choteau    Fort Benton                                                                                          n/a
O'Neill       Hugh      370-A       36        40       Madison    Ruby Valley (3)                                                                                      n/a
O'Neill       William   381-D       3044      30       Madison    Alder Gulch                                                                                          n/a
ONIEL,        Alex      263A        780       39       Jefferson  SPRINGVILLE MINES
ONIEL,        Lula      263A        782       4        Jefferson  SPRINGVILLE MINES
ONIEL,        Rhoda     263A        781       19       Jefferson  SPRINGVILLE MINES
O'Niel,       Andrew J. 259B        544       21       Jefferson                                                                                                       RADERSBURGH
ONSTODD       GEORGE    33D         181       20       Choteau    Fort Benton                                                                                          n/a
Opara         Eugene    187A        3240      9        Deer Lodge Nevada Creek
Opara         James     187A        3238      13       Deer Lodge Nevada Creek
Opara         John      187A        3239      11       Deer Lodge Nevada Creek
OPPENLANDER   WM.       42A         1019      30       Choteau    Fort Benton                                                                                          n/a
Oram          Henry     19B         248       19       Beaverhead Glendale                                                                                             n/a
O'RAN         D.        322-C       4760      48       Lewis & ClaSILVER CREEK & VIRGINIA CREEK
Oreian        Micheal   167A        1380      28       Deer Lodge Hasmarck
O'Reilly      Lawrence  159B        663       40       Deer Lodge Yam Hill
Orell         Chas.     15A         1308      20       Beaverhead Beaverhead River                                                                                     n/a
Oren          John      13A         1070      42       Beaverhead Beaverhead River                                                                                     n/a
O'RILEY       DANIEL    54B         2073      42       Choteau    Thonkin Creek
O'RILEY       JANE      54B         2074      36       Choteau    Thonkin Creek
Oringer       Chas.     349-B       6         14       Madison    District 27                                                                                          n/a
Orman         Robt      171B        1781      29       Deer Lodge New Chicago
O'RORE        Addison   1                              Beaverhead                                                                                                      City of Dillon
O'Rourk       David     181B        2706      37       Deer Lodge                                                                                                      Deer Lodge (3)
Orr           Bert      8D          708       2        Beaverhead Beaverhead River                                                                                     n/a
Orr           Charlie   8D          707       5        Beaverhead Beaverhead River                                                                                     n/a
Orr           Earnest   8D          705       8        Beaverhead Beaverhead River                                                                                     n/a
Orr           George    26C         880       40       Beaverhead Lion's City                                                                                          n/a
Orr           Marshall  430B        2669      22       Meagher    Musselshell Valley
Orr           Mathew    8D          704       10       Beaverhead Beaverhead River                                                                                     n/a
Orr           Newton    C           21        23       Madison    Salisbury                                                                                            n/a
Orr           Rachel    8D          703       41       Beaverhead Beaverhead River                                                                                     n/a
Orr           Rebecca   222-B       139       49       Gallatin   West Gallatin Valley
Orr           Robert    222-B       139       50       Gallatin   West Gallatin Valley
Orr           Sample H. 430B        2668      29       Meagher    Musselshell Valley
Orr           Willie    8D          706       7        Beaverhead Beaverhead River                                                                                     n/a
Orr           Wm.       8D          702       51       Beaverhead Beaverhead River                                                                                     n/a
ORTAL,        Henry     241A        414       29       Jefferson  WICKES & VICINITY
ORTEN         WM. J.    46B         1475      28       Choteau    Fort Benton                                                                                          n/a
ORTEN         WM. J.    42B         1098      28       Choteau    Fort Benton                                                                                          n/a
Ortendorffr   Henry     190D        3557      39       Deer Lodge North Bear & Hellgate Rivers
Orton         Oscar     156D        360       29       Deer Lodge Deer Lodge Valley
Ortrom        Jerome    4C          339       51       Beaverhead Beaverhead River                                                                                     n/a
OSBORN        JAS.      32B         59        23       Choteau    Fort Benton                                                                                          n/a
Osborn        Samiel E. 425A        2217      40       Meagher    Chestnut Valley                                                                                      Chestnut Valley Post Office
OSBORN,       Chas.     241B        474       24       Jefferson  WICKES & VICINITY & MOUNTAINS TO THE WEST
OSBORN,       H.        239B        250       33       Jefferson  CATARACT & BASIN CREEKS (TRIBUTARIES OF BOULDER RIVER & VICINITY
OSBORN,       H.        237A        34        32       Jefferson  VICINITY OF LITTLE BOULDER RIVER & BOULDER RIVER & CATARACT CREEK
OSBORNE       BRYAN     62A         2400      47       Choteau    Maria's River
OSBORNE       x         62A         2400A     3        Choteau    Maria's River
Osgood        Charles   419B        1876      43       Meagher    Upper Judith Valley                                                                                  Yogo Gulch Mines
OSTENHAGEN    FRITZ     38B         682       37       Choteau    Fort Benton                                                                                          n/a
OSTERDALE     HENRY     50B         1852      17       Choteau    Sun Teton River
Ostrander     Alonzo    402A        651       43       Meagher    SMITH RIVER VALLEY
Oswald        Jacob     379-C       2814      19       Madison    Alder Gulch                                                                                          n/a
OSWALD,       Catherine 264Dq       871       38       Jefferson  ST. LOUIS & MOUNTAINS
OSWALD,       Daisy E.  264Dq       873       7        Jefferson  ST. LOUIS & MOUNTAINS
OSWALD,       George    264Dq       870       44       Jefferson  ST. LOUIS & MOUNTAINS
OSWALD,       Minnie L. 264Dq       874       3        Jefferson  ST. LOUIS & MOUNTAINS
OSWALD,       William J.264Dq       872       9        Jefferson  ST. LOUIS & MOUNTAINS
Oswis         Henry     408A        1024      30       Meagher    Oregan & adjoining Gulches
OSWOLD        JNO. B.   49C         1728      45       Choteau    Sun River
Otis          Frank     360-C       31        37       Madison    Silver Star                                                                                          n/a
O'TOOL        P.        240C        321       24       Jefferson  WICKES & VICINITY
Ott           Ella      388-A       17        25       Madison    Virginia City                                                                                        n/a
Ott           Hattie    388-A       18        5        Madison    Virginia City                                                                                        n/a
OTTERSON      JOS.      32B         60        29       Choteau    Fort Benton                                                                                          n/a
Ottley        Leslie    364-B       1428      22       Madison    Beaverhead Valley                                                                                    n/a
Otto          Albert    375-C       11        35       Madison    Ruby Valley (3)                                                                                      n/a
Otto          Betty     375-C       13        16       Madison    Ruby Valley (3)                                                                                      n/a
Otto          Henry     192D        3767      49       Deer Lodge California Gulch and McLelen and Snowshoe
Otto          Sarah     375-C       12        31       Madison    Ruby Valley (3)                                                                                      n/a
Otts          Isadel    391-D       15        24       Madison    Virginia City                                                                                        n/a
Otuen         Bell M.   351-B       25        38       Madison    Meadow Creek                                                                                         n/a
Otuen         Cora B.   351-B       26        20       Madison    Meadow Creek                                                                                         n/a
Otuen         E.R.      351-B       24        48       Madison    Meadow Creek                                                                                         n/a
Otuen         Jennie E. 351-B       27        16       Madison    Meadow Creek                                                                                         n/a
Ovance        Cornelia  176C        2155      50       Deer Lodge                                                                                                      Deer Lodge (2)
Ovance        Henry     176C        2156      15       Deer Lodge                                                                                                      Deer Lodge (2)
Ovance        Minie     176C        2157      12       Deer Lodge                                                                                                      Deer Lodge (2)
Ovance        R.        176C        2154      45       Deer Lodge                                                                                                      Deer Lodge (2)
Overill       Truman V. 23A         563       25       Beaverhead Glendale                                                                                             n/a
OVERLY        David H.                                 Beaverhead                                                                                                      Dewey's Flat
Overman       Anna      159A        600       30       Deer Lodge Yam Hill
Overman       Frank     159A        599       31       Deer Lodge Yam Hill
OVERMAN,      Allenn    241A        432       27       Jefferson  WICKES & VICINITY
OWEN,         Purnell   262D        723       33       Jefferson  CROW CREEK VALLEY
Owens         Briget    165A        1196      41       Deer Lodge Philipsburg
Owens         James     29A         1169      45       Beaverhead Trapper Gulch                                                                                        n/a
Owens         John      165A        1172      60       Deer Lodge Philipsburg
Owens         Mary      165A        1197      6        Deer Lodge Philipsburg
Owens         Oscar     16C         1370      62       Beaverhead Beaverhead River                                                                                     n/a
Owens         Thomas    26C         864       22       Beaverhead Lion's City                                                                                          n/a
OWNES         M.        69B         276       28       Choteau    Ft Assinniboine                                                                                      Ft Assinniboine
Oxley         James     406B        889       48       Meagher    Oregan & adjoining Gulches
Oyler         George    233-C       202       36       Gallatin   West Gallatin Valley