| Surname | Given | Birth or Age | County | Reel | Seq | Corr |
|---|---|---|---|---|---|---|
| Oikri | Henrik Emil | 1883 | Portland 2 | 19 | 4144 | |
| Oinonen | Oscar | 1888 | Portland 7 | 25 | 140 | |
| Oisch | Richard Lee | 1883 | Portland 7 | 25 | 134 | *Oet |
| Oishi | Shuuzo | 1879 | Portland 1 | 18 | 362 | |
| Oium | George Oscar | 1876 | Josephine | 10 | 3171 | |
| Oja | Abel | 1872 | Clatsop | 4 | 4183 | |
| Oja | Charles Olaf | 1881 | Portland 5 | 23 | 25 | |
| Oja | Erick | 1881 | Clatsop | 4 | 4182 | |
| Oja | Henry | 1880 | Portland 1 | 18 | 363 | |
| Oja | John J | 1885 | Clatsop | 4 | 4180 | |
| Oja | Matt | 1878 | Clatsop | 4 | 4184 | |
| Oja | Nickolai | 1886 | Clatsop | 4 | 4185 | |
| Oja | Paul | 1877 | Clatsop | 4 | 4190 | *Ojn |
| Oja | Wayne Jalmer | 1900 | Clatsop | 4 | 4181 | |
| Ojala | Frank Malakias | 1882 | Yamhill | 32 | 4362 | *Nor |
| Ojalammi | Matti | 1877 | Columbia | 5 | 3329 | |
| Ojanen | Canstant | 1878 | Clatsop | 4 | 4186 | |
| Ojanen | Gust | 1887 | Clatsop | 4 | 4187 | |
| Ojanieni | Nestor | 1894 | Clatsop | 4 | 4188 | |
| Ojna | Eli | 1896 | Clatsop | 4 | 4189 | |
| Ojo | Charles | 1899 | Clatsop | 4 | 4191 | |
| Oka | Moichi | 1887 | Portland 9 | 26 | 2735 | *Nel |
| Oka | Siyokichi | 1892 | Portland 9 | 26 | 2737 | *Nel |
| Oka | Teizo | 1880 | Baker | 1 | 2977 | |
| Oka | Tomio | 1900 | Union | 30 | 448 | |
| Oka | Toramasu | 1898 | Clatsop | 4 | 4192 | |
| Okabayashi | Wakichi | 1879 | Portland 1 | 18 | 364 | |
| Okabe | Mataroka | 1881 | Portland 1 | 18 | 365 | |
| Okada | Kinuhachi | 1884 | Portland 1 | 18 | 366 | |
| Okada | Sadao | 1883 | Portland 1 | 18 | 367 | |
| Okada | Takuma | 1888 | Portland 2 | 19 | 4145 | |
| Okado | Goichi | 1886 | Portland 9 | 26 | 2736 | *Nel |
| Okafuji | Tokusaburow | 1874 | Baker | 1 | 2978 | |
| Okagama | Sozaburo | 1886 | Portland 1 | 18 | 353 | *Ogu |
| Okamoto | Hisajiro | 1884 | Portland 1 | 18 | 368 | |
| Okamoto | Kakuji | 1883 | Portland 1 | 18 | 369 | |
| Okamoto | Makitaro | 1888 | Portland 1 | 18 | 370 | |
| Okamoto | Saichi | 1879 | Baker | 1 | 2979 | |
| Okamoto | Satore | 1876 | Baker | 1 | 2980 | |
| Okamoto | Shiguto | 1888 | Clatsop | 4 | 4193 | |
| Okamoto | Tom | 1885 | Wasco | 31 | 909 | |
| Okamura | J | 1876 | Hood River | 9 | 2525 | |
| Okamura | Kamijoro | 1882 | Baker | 1 | 2981 | |
| Okamura | Toku | 1888 | Portland 2 | 19 | 4146 | |
| Okane | Elmer Edwin | 1880 | Marion 2 | 15 | 2528 | |
| Okasaki | Yoshiharu | 1893 | Portland 1 | 18 | 371 | |
| Okawa | Goich | 1887 | Portland 1 | 18 | 372 | |
| Okawa | Hyozo | 1886 | Portland 1 | 18 | 373 | |
| Okawa | Tannegoro | 1887 | Lake | 11 | 2541 | |
| Okawa | Tomizi | 1890 | Clatsop | 4 | 4194 | |
| Okazaki | Chikara | 1878 | Baker | 1 | 2982 | |
| Okazaki | Hidekichi | 1887 | Portland 1 | 18 | 374 | |
| Okazaki | Joke | 1883 | Portland 1 | 18 | 375 | |
| Okazaki | Mohei | 1885 | Hood River | 9 | 2526 | |
| Okazaki | Morisuke | 1876 | Portland 1 | 18 | 376 | |
| Okazaki | Shigeyo | 1886 | Portland 1 | 18 | 377 | |
| Okazaki | Shizuwo | 1898 | Portland 1 | 18 | 378 | |
| Okazaki | Tomo | 1888 | Multnomah | 16 | 1738 | |
| Okazaki | Zenjuro | 1882 | Portland 1 | 18 | 379 | |
| Oke | James Miller | 1890 | Benton | 2 | 1629 | |
| Okeilind | Klaus Sigfrid | 1890 | Portland 8 | 25 | 5110 | |
| Okell | George Arthur | 1878 | Portland 6 | 24 | 377 | |
| Okerlund | Richard | 1878 | Portland 2 | 19 | 4148 | *Oki |
| Okerson | Samuel Benjamin | 1872 | Yamhill | 32 | 4363 | *Nor |
| Okeson | Christ | 1879 | Clatsop | 4 | 4195 | |
| Okey | Jerry Franklin | 1873 | Union | 30 | 449 | |
| Oki | Fusakishi | 1879 | Portland 1 | 18 | 380 | |
| Oki | Ghachi | 1881 | Clatsop | 4 | 4196 | |
| Oki | Hikajiro | 1878 | Portland 1 | 18 | 381 | |
| Okida | Matsutaro | 1887 | Hood River | 9 | 2527 | |
| Okinaga | Gasaku | 1881 | Baker | 1 | 2983 | |
| Okinaga | Hikoichi | 1881 | Portland 1 | 18 | 382 | |
| Okino | Yoroku | 1876 | Portland 1 | 18 | 383 | |
| Okita | Enpei | 1873 | Portland 2 | 19 | 4147 | |
| Okita | Kanichi | 1885 | Multnomah | 16 | 1741 | |
| Okita | Shintaro | 1878 | Multnomah | 16 | 1742 | |
| Okita | Tameshiro | 1876 | Portland 2 | 19 | 4149 | |
| Okita | Tinakaro | 1873 | Hood River | 9 | 2528 | |
| Okita | Tom | 1875 | Multnomah | 16 | 1743 | |
| Oko | G | 1895 | Union | 30 | 450 | |
| Okobe | Sumitaro | 1877 | Jackson | 9 | 5545 | |
| Okrzeja | Ben | 1892 | Harney | 9 | 938 | *Oar |
| Oksa | John | 1883 | Portland 10 | 27 | 2715 | |
| Oksanen | August William | 1880 | Portland 8 | 25 | 5111 | |
| Okubo | Asajiro | 1882 | Portland 1 | 18 | 384 | |
| Okubo | Kanji | 1881 | Baker | 1 | 2984 | |
| Okubo | Sanjiro | 1884 | Multnomah | 16 | 1744 | |
| Okubo | Seichi | 1878 | Clatsop | 4 | 4197 | |
| Okubo | Tenjiro | 1876 | Portland 1 | 18 | 385 | |
| Okubo | Zutuetoro | 1874 | Clatsop | 4 | 4198 | |
| Okuda | Enzo | 1878 | Marion 1 | 14 | 4992 | |
| Okuda | S | 1882 | Yamhill | 32 | 4364 | *Nor |
| Okura | K | 1879 | Baker | 1 | 2985 | |
| Olaen | Lars | 1877 | Columbia | 5 | 3330 | |
| Olaen | Leonard Ove | 1900 | Columbia | 5 | 3331 | |
| Olafson | Olaf Alben | 1877 | Clatsop | 4 | 4199 | |
| Olajos | Steve | 1877 | Malheur | 14 | 684 | |
| Oland | Joseph Edward | 1888 | Coos | 6 | 3786 | |
| Oland | Lewis Welly | 1884 | Coos | 6 | 3787 | |
| Oland | Lorren Jerett | 1882 | Portland 8 | 25 | 5112 | |
| Olander | Fred Anton | 1878 | Portland 8 | 25 | 5113 | |
| Olander | George Leslie | 1900 | Portland 8 | 25 | 5114 | |
| Olander | John Albin | 1882 | Portland 10 | 27 | 2716 | |
| Olander | Lester | 1898 | Crook | 7 | 712 | |
| Olander | Nels | 1875 | Clatsop | 4 | 4200 | |
| Olander | Paul | 1889 | Portland 4 | 21 | 5533 | |
| Olannsen | John Marinius | 1898 | Columbia | 5 | 3333 | |
| Olano | Andreas | 1898 | Malheur | 14 | 685 | |
| Olano | Sabino Bilboa | 1897 | Malheur | 14 | 686 | |
| Olansen | Ole Martin | 1888 | Clatsop | 4 | 4201 | |
| Olarsen | Julius | 1876 | Portland 1 | 18 | 386 | |
| Olausen | Hendrick Olai | 1877 | Columbia | 5 | 3332 | |
| Olavarria | Constantino | 1891 | Harney | 9 | 941 | |
| Olavarria | Felix | 1894 | Malheur | 14 | 687 | |
| Olbeham | Walter E | 1894 | Washington | 31 | 1985 | *Alr |
| Olbekson | Arthur Stanton | 1890 | Yamhill | 32 | 4365 | *Nor |
| Olbrich | Franz | 1887 | Multnomah | 16 | 1745 | |
| Olcot | Clarence Eugene | 1885 | Portland 7 | 25 | 141 | |
| Olcott | Ben Wilson | 1872 | Marion 1 | 14 | 4993 | |
| Olcott | Chas E | 1893 | Marion 1 | 14 | 4994 | |
| Olcott | Herbert Renno | 1876 | Portland 5 | 23 | 23 | |
| Olcott | Herman W | 1896 | Linn | 13 | 2470 | |
| Olcott | Wiley Hubert | 1895 | Douglas | 8 | 1458 | |
| Oldaker | Charles E | 1888 | Portland 5 | 23 | 26 | |
| Olden | Elmer A | 1900 | Polk | 16 | 4843 | |
| Olden | Grant | 1878 | Morrow | 15 | 4546 | |
| Olden | John R | 1873 | Morrow | 15 | 4547 | |
| Olden | Maynard Andrew | 1890 | Portland 8 | 25 | 5115 | |
| Olden | Ragenwold Bertram | 1888 | Portland 6 | 24 | 378 | |
| Olden | Raymond Ivan | 1899 | Portland 5 | 23 | 27 | |
| Olden | Wilton Dighton | 1873 | Portland 5 | 23 | 28 | |
| Oldenberg | George | 1891 | Yamhill | 32 | 4387 | |
| Oldenburg | Amel August | 1876 | Clackamas | 3 | 2425 | |
| Oldenburg | Frank A | 1889 | Multnomah | 16 | 1747 | |
| Oldenburg | Frank Herman | 1874 | Clackamas | 3 | 2426 | |
| Oldenburg | George Fremont | 1882 | Clackamas | 3 | 2427 | |
| Oldenburg | John | 1879 | Yamhill | 32 | 4526 | *Pet |
| Oldenburg | Louie | 1889 | Yamhill | 32 | 4527 | *Pet |
| Oldenburg | Louis | 1892 | Marion 1 | 14 | 4995 | |
| Oldenburg | Louis V | 1887 | Multnomah | 16 | 1748 | |
| Oldenburg | William | 1885 | Yamhill | 32 | 4530 | *Pet |
| Oldenstadt | Earl | 1900 | Clackamas | 3 | 2428 | |
| Oldenstadt | Frank August | 1898 | Clackamas | 3 | 2429 | |
| Oldenstadt | George Ernest | 1899 | Clackamas | 3 | 2430 | |
| Oldenstadt | Otto Oscar | 1896 | Clackamas | 3 | 2431 | |
| Older | Louis Phillip | 1898 | Portland 2 | 19 | 4151 | |
| Older | William Robert | 1873 | Portland 6 | 24 | 379 | |
| Oldfield | Arthur | 1888 | Gilliam | 8 | 3669 | |
| Oldfield | Barney | 1890 | Umatilla | 29 | 201 | |
| Oldfield | Carl C | 1884 | Clackamas | 3 | 2432 | |
| Oldfield | Samuel | 1874 | Portland 10 | 27 | 2717 | |
| Oldham | Arthur | 1873 | Portland 4 | 21 | 5534 | |
| Oldham | Carle | 1891 | Multnomah | 16 | 1746 | |
| Oldham | Harry Starkey | 1894 | Portland 6 | 24 | 381 | |
| Oldham | James Lester | 1893 | Yamhill | 32 | 4531 | *Pet |
| Oldham | Jay Freddie | 1896 | Lane | 12 | 1575 | |
| Oldham | John Fliming | 1876 | Portland 7 | 25 | 142 | |
| Oldham | Newton Sylvester | 1879 | Clackamas | 3 | 2433 | |
| Oldham | Raleigh Raymond | 1881 | Hood River | 9 | 2529 | |
| Oldham | Walter Carl | 1874 | Portland 7 | 25 | 143 | |
| Olding | Frank Bruce | 1880 | Josephine | 10 | 3172 | |
| Oldkam | Edgar Berton | 1874 | Lane | 12 | 1574 | |
| Oldland | Henry Edward | 1888 | Coos | 6 | 3788 | |
| Oldland | Stanley Robert | 1882 | Coos | 6 | 3789 | |
| Oldland | Walter Oliver | 1885 | Coos | 6 | 3790 | |
| Oldrum | Joseph | 1889 | Hood River | 9 | 2530 | |
| Olds | Adelbert | 1888 | Sherman | 27 | 5762 | |
| Olds | Albert Henry | 1885 | Portland 5 | 23 | 29 | |
| Olds | Arthur Dean | 1891 | Sherman | 27 | 5761 | |
| Olds | Charles B | 1880 | Sherman | 27 | 5763 | |
| Olds | Charles Henry Hughes | 1896 | Clackamas | 3 | 2434 | |
| Olds | Charles W | 1889 | Portland 2 | 19 | 4152 | |
| Olds | Charlie | 1873 | Baker | 1 | 2986 | |
| Olds | Chester Earl | 1892 | Sherman | 27 | 5764 | |
| Olds | Dellon Warren | 1892 | Clackamas | 3 | 2435 | |
| Olds | Francis Robert | 1882 | Klamath | 11 | 442 | |
| Olds | Frank | 1884 | Sherman | 27 | 5765 | |
| Olds | Glenn Alvers | 1893 | Marion 1 | 14 | 4996 | |
| Olds | Harold Dale | 1899 | Clackamas | 3 | 2436 | |
| Olds | Horace David | 1883 | Portland 2 | 19 | 4153 | |
| Olds | John | 1894 | Washington | 31 | 5095 | *Ole |
| Olds | Laurence | 1872 | Tillamook | 28 | 1438 | |
| Olds | Lester E | 1875 | Portland 8 | 25 | 5116 | |
| Olds | Lewis A | 1875 | Sherman | 27 | 5766 | |
| Olds | Meryle E | 1898 | Portland 2 | 19 | 4154 | |
| Olds | Norman | 1882 | Marion 2 | 15 | 2529 | |
| Olds | Oliver Frederick | 1898 | Josephine | 10 | 3173 | |
| Olds | Orval Merle | 1896 | Clackamas | 3 | 2437 | |
| Olds | Revil Edwin | 1898 | Washington | 31 | 5096 | *Ole |
| Olds | Samuel Christopher | 1880 | Washington | 31 | 5097 | *Ole |
| Olds | Will Ruel | 1882 | Sherman | 27 | 5767 | |
| Oldsen | Johann Adolph | 1887 | Umatilla | 29 | 202 | |
| Oleachea | Jesus | 1888 | Harney | 9 | 943 | |
| Oleachea | Vedal | 1890 | Harney | 9 | 944 | |
| Oleen | Olof Henry | 1877 | Columbia | 5 | 3334 | |
| Oleen | William Alexander | 1882 | Columbia | 5 | 3335 | |
| Olehy | Arthur Albert | 1876 | Portland 2 | 19 | 4155 | |
| Oleisy | Frank | 1879 | Portland 1 | 18 | 387 | |
| Olekson | Mike | 1885 | Portland 2 | 19 | 4156 | |
| Olem | John Holliday | 1874 | Portland 2 | 19 | 4164 | *Oli |
| Oleman | Albert | 1891 | Coos | 6 | 3791 | |
| Oleman | Charles Peter | 1874 | Marion 1 | 14 | 4997 | |
| Oleman | David E | 1893 | Polk | 16 | 4842 | |
| Oleman | Flemming D | 1895 | Polk | 16 | 4844 | |
| Oleman | Frederick William | 1891 | Benton | 2 | 1630 | |
| Oleman | Henry Albert | 1888 | Benton | 2 | 1631 | |
| Oleman | Henry William | 1887 | Wallowa | 30 | 3518 | |
| Oleman | John E | 1883 | Polk | 16 | 4845 | |
| Oleman | Levi Lawrence | 1891 | Polk | 16 | 4846 | |
| Oleman | Oliver Stanley | 1884 | Benton | 2 | 1632 | |
| Olenick | Wlagimir | 1888 | Portland 3 | 20 | 3954 | |
| Olesen | Olaf | 1890 | Lane | 12 | 1576 | |
| Oleski | Steve | 1880 | Portland 3 | 20 | 3960 | |
| Oleson | Ed | 1874 | Lane | 12 | 1587 | *Ols |
| Oleson | Emil | 1885 | Washington | 31 | 5093 | |
| Oleson | George Walter | 1888 | Portland 1 | 18 | 388 | |
| Oleson | Gustaf Adolf | 1880 | Portland 2 | 19 | 4199 | *Ols |
| Oleson | John Alden | 1879 | Washington | 31 | 5094 | |
| Oleson | John Thomas | 1887 | Yamhill | 32 | 4534 | *Pet |
| Oleson | Magnus | 1873 | Portland 2 | 19 | 4203 | *Ols |
| Oleson | Mike | 1893 | Portland 3 | 20 | 3956 | |
| Oleson | Olaf | 1892 | Grant | 8 | 5136 | *Olm |
| Oleson | Olaf | 1889 | Marion 1 | 14 | 4998 | |
| Oleson | Stephen Thomas | 1891 | Yamhill | 32 | 4388 | |
| Oleson | Victor | 1893 | Douglas | 8 | 1459 | |
| Olessio | Antiga | 1894 | Portland 2 | 19 | 4157 | |
| Olett | Ben | 1887 | Clackamas | 3 | 2438 | |
| Olexy | Peter John | 1875 | Portland 2 | 19 | 4158 | |
| Olfsted | Haakon Alfred | 1897 | Portland 2 | 19 | 4159 | |
| Olgner | Max Fred | 1889 | Portland 9 | 26 | 2739 | *Nel |
| Olguin | Dave | 1898 | Douglas | 8 | 1460 | |
| Olian | Fred Nelson | 1887 | Portland 7 | 25 | 144 | |
| Olin | August William | 1894 | Multnomah | 16 | 1749 | |
| Olin | Elmer | 1883 | Portland 8 | 25 | 5117 | |
| Olin | Fred Rollin | 1876 | Marion 1 | 14 | 4999 | |
| Olin | Giles Amos | 1884 | Lincoln | 12 | 4668 | *Ols |
| Olin | Gustof Reinghold | 1884 | Portland 8 | 25 | 5118 | |
| Olin | Henry | 1882 | Multnomah | 16 | 1750 | |
| Olin | John Fred | 1891 | Multnomah | 16 | 1751 | |
| Olin | Joseph Samuel | 1882 | Coos | 6 | 3792 | |
| Olin | Otto | 1873 | Portland 10 | 27 | 2718 | |
| Olin | Stanley Putnam | 1878 | Portland 7 | 25 | 145 | |
| Olin | Walter W | 1890 | Portland 10 | 27 | 2719 | |
| Olin | William Everet | 1877 | Portland 8 | 25 | 5119 | |
| Olinger | Bert C | 1879 | Wasco | 31 | 910 | |
| Olinger | David Wallace | 1873 | Umatilla | 29 | 203 | |
| Olinger | Frank Marlen | 1882 | Baker | 1 | 2987 | |
| Olinger | Harold Howard | 1891 | Portland 2 | 19 | 4160 | |
| Olinger | Harry | 1882 | Portland 1 | 18 | 389 | |
| Olinger | Harry H | 1875 | Marion 1 | 14 | 5000 | |
| Olinger | Jasper Eldorado | 1880 | Umatilla | 29 | 204 | |
| Olinger | LeVerne William | 1881 | Portland 4 | 21 | 5535 | |
| Olinghouse | Charles W | 1878 | Douglas | 8 | 1462 | |
| Olinghouse | Francis Syral | 1874 | Portland 6 | 24 | 383 | |
| Olinghouse | James Binger | 1894 | Portland 6 | 24 | 384 | |
| Oliphant | Earnest Clarence | 1884 | Multnomah | 16 | 1752 | |
| Oliphant | Ezra C | 1887 | Yamhill | 32 | 4390 | |
| Oliphant | Roscoe Conkling | 1882 | Marion 2 | 15 | 2530 | |
| Oliv | Victor | 1889 | Clatsop | 4 | 4206 | |
| Oliver | Aldurn Verne | 1882 | Portland 7 | 25 | 146 | |
| Oliver | Alexander Joseph (Jr) | 1878 | Coos | 6 | 3794 | *Oll |
| Oliver | Alexander McEwen | 1876 | Portland 7 | 25 | 147 | |
| Oliver | Alfred Alexander | 1878 | Benton | 2 | 1633 | |
| Oliver | Alfred Judson | 1896 | Washington | 31 | 5098 | |
| Oliver | Alfred W | 1894 | Marion 1 | 14 | 5001 | |
| Oliver | Andrew | 1899 | Benton | 2 | 1634 | |
| Oliver | Anthony | 1887 | Portland 10 | 27 | 2720 | |
| Oliver | Avery Watson | 1898 | Linn | 13 | 2471 | |
| Oliver | Bart Marion | 1884 | Union | 30 | 451 | |
| Oliver | Burl Raymond | 1891 | Polk | 16 | 4847 | |
| Oliver | Burt Leonard | 1888 | Wallowa | 30 | 3522 | |
| Oliver | Burt Leroy | 1892 | Harney | 9 | 945 | |
| Oliver | Carmen Oran | 1893 | Umatilla | 29 | 205 | |
| Oliver | Cecil Lynn | 1896 | Portland 5 | 23 | 30 | |
| Oliver | Charles Albert Knight | 1886 | Portland 2 | 19 | 4161 | |
| Oliver | Charley Ross | 1877 | Deschutes | 7 | 3515 | |
| Oliver | Chester Leo | 1893 | Union | 30 | 452 | |
| Oliver | Clarence Coleman | 1896 | Malheur | 14 | 689 | |
| Oliver | Claud Frederick | 1895 | Umatilla | 29 | 210 | |
| Oliver | Claude | 1887 | Baker | 1 | 3002 | *Ols |
| Oliver | Clyde | 1886 | Wasco | 31 | 911 | |
| Oliver | David Gillings | 1886 | Baker | 1 | 3003 | *Ols |
| Oliver | DeOracie Norman | 1900 | Portland 8 | 25 | 5120 | |
| Oliver | Earl William | 1886 | Malheur | 14 | 688 | |
| Oliver | Edward J | 1888 | Portland 10 | 27 | 2721 | |
| Oliver | Edward W | 1896 | Polk | 16 | 4848 | |
| Oliver | Ernest James | 1891 | Portland 4 | 21 | 5536 | |
| Oliver | Ernest R | 1892 | Jefferson | 10 | 1820 | |
| Oliver | Eugene | 1884 | Portland 10 | 27 | 2722 | |
| Oliver | Felix | 1887 | Portland 3 | 20 | 3961 | |
| Oliver | Frank | 1888 | Grant | 8 | 5133 | |
| Oliver | Frank Homer | 1883 | Union | 30 | 453 | |
| Oliver | Frank Mitchell | 1875 | Tillamook | 28 | 1439 | |
| Oliver | Frank R | 1896 | Portland 10 | 27 | 2723 | |
| Oliver | Frank Watson | 1875 | Linn | 13 | 2472 | |
| Oliver | Franklin Rosco | 1877 | Baker | 1 | 2988 | |
| Oliver | George | 1888 | Benton | 2 | 1635 | |
| Oliver | George Emmett | 1874 | Umatilla | 29 | 211 | |
| Oliver | George Francis | 1888 | Jefferson | 10 | 1822 | |
| Oliver | George Oscar | 1877 | Klamath | 11 | 445 | |
| Oliver | Glen | 1888 | Tillamook | 28 | 1440 | |
| Oliver | Gregory Lines | 1891 | Portland 3 | 20 | 3962 | |
| Oliver | Guy | 1878 | Wallowa | 30 | 3526 | |
| Oliver | Harlow Perry | 1879 | Union | 30 | 454 | |
| Oliver | Harry Embody | 1889 | Washington | 31 | 5099 | |
| Oliver | Harry Hamilton | 1894 | Malheur | 14 | 690 | |
| Oliver | Harry Orville | 1877 | Portland 1 | 18 | 390 | |
| Oliver | Harry Peck | 1886 | Portland 2 | 19 | 4162 | |
| Oliver | Henry Stark | 1893 | Umatilla | 29 | 212 | |
| Oliver | Herbert | 1893 | Portland 4 | 21 | 5537 | |
| Oliver | Herbert Lacey | 1900 | Hood River | 9 | 2531 | |
| Oliver | Herman | 1885 | Grant | 8 | 5134 | |
| Oliver | Hugh Warren | 1885 | Jackson | 9 | 5546 | |
| Oliver | James Frederick | 1895 | Washington | 31 | 5100 | |
| Oliver | James Henry | 1875 | Lane | 12 | 1577 | |
| Oliver | Jay Arthur | 1892 | Baker | 1 | 3004 | *Ols |
| Oliver | Jeptha | 1878 | Portland 1 | 18 | 391 | |
| Oliver | John | 1887 | Klamath | 11 | 440 | |
| Oliver | John | 1881 | Wasco | 31 | 912 | |
| Oliver | John | 1892 | Portland 8 | 25 | 5121 | |
| Oliver | John Alvarez | 1875 | Malheur | 14 | 691 | |
| Oliver | John Frank | 1881 | Umatilla | 29 | 213 | |
| Oliver | John Mason | 1880 | Wallowa | 30 | 3527 | |
| Oliver | John Wesley | 1899 | Josephine | 10 | 3176 | *Ols |
| Oliver | Joseph David | 1878 | Baker | 1 | 2989 | |
| Oliver | Joseph J | 1875 | Portland 8 | 25 | 5122 | |
| Oliver | Joseph Werner | 1899 | Clatsop | 4 | 4202 | |
| Oliver | Leigh Hunt | 1887 | Wasco | 31 | 913 | |
| Oliver | Leland Gene | 1894 | Baker | 1 | 3005 | *Ols |
| Oliver | Leonard Drew | 1897 | Portland 10 | 27 | 2724 | |
| Oliver | Mark Turner | 1895 | Union | 30 | 455 | |
| Oliver | Melvin Oscar | 1899 | Portland 7 | 25 | 150 | *Olm |
| Oliver | Norman Rutherford | 1878 | Portland 2 | 19 | 4165 | |
| Oliver | Orville Tappen | 1897 | Jefferson | 10 | 1821 | |
| Oliver | Oscar | 1878 | Clatsop | 4 | 4204 | |
| Oliver | Paul Marry | 1882 | Portland 4 | 21 | 5538 | |
| Oliver | Peter | 1893 | Umatilla | 29 | 214 | |
| Oliver | Ralph Elmer | 1882 | Portland 2 | 19 | 4166 | |
| Oliver | Ralph Elmer | 1882 | Portland 3 | 20 | 3963 | |
| Oliver | Roland Neil | 1880 | Umatilla | 29 | 215 | |
| Oliver | Roy Earl | 1895 | Lake | 11 | 2545 | *Ols |
| Oliver | Roy T | 1882 | Multnomah | 16 | 1753 | |
| Oliver | Taylor | 1893 | Portland 10 | 27 | 2725 | |
| Oliver | Victor | 1879 | Columbia | 5 | 3341 | *Oll |
| Oliver | Wadsworth Wesley | 1896 | Portland 6 | 24 | 385 | |
| Oliver | Walter David | 1885 | Jackson | 9 | 5547 | |
| Oliver | Walter Glenn | 1888 | Portland 3 | 20 | 3964 | |
| Oliver | Walter H | 1889 | Tillamook | 28 | 1441 | |
| Oliver | Walter H | 1883 | Portland 3 | 20 | 3965 | |
| Oliver | William Bert | 1882 | Clatsop | 4 | 4205 | |
| Oliver | William Erastus | 1873 | Umatilla | 29 | 216 | |
| Oliver | William Mills | 1886 | Portland 6 | 24 | 386 | |
| Oliver | William Ray | 1893 | Portland 5 | 23 | 31 | |
| Oliver | William Robert E Lee | 1883 | Clatsop | 4 | 4203 | |
| Oliverio | Carmine | 1888 | Portland 3 | 20 | 3966 | |
| Oliverio | Pasquale | 1884 | Multnomah | 16 | 1754 | |
| Oliverio | Pedro | 1895 | Clatsop | 4 | 4207 | |
| Olivero | Carmine | 1889 | Portland 5 | 23 | 32 | |
| Olivero | Joe | 1874 | Portland 2 | 19 | 4163 | |
| Olivero | Luigi | 1884 | Portland 5 | 23 | 33 | |
| Olivero | Vincenzo | 1887 | Portland 5 | 23 | 34 | |
| Olivier | Romney | 1888 | Portland 1 | 18 | 392 | |
| Olivito | Tony | 1893 | Clatsop | 4 | 4208 | |
| Olivo | Vrnier | 1884 | Deschutes | 7 | 3514 | |
| Olk | Ervin Edward | 1898 | Malheur | 14 | 692 | |
| Olk | Willie Richard | 1879 | Baker | 1 | 2990 | |
| Olker | Charles Matt | 1878 | Portland 1 | 18 | 393 | |
| Olkey | David William | 1900 | Yamhill | 32 | 4389 | |
| Ollar | William Miles | 1889 | Clatsop | 4 | 4211 | |
| Ollenback | Walter Henry | 1888 | Portland 4 | 21 | 5539 | |
| Oller | Albert | 1896 | Jefferson | 10 | 1823 | |
| Oller | Bert John | 1873 | Portland 5 | 23 | 35 | |
| Oller | Claud Cunningham | 1884 | Portland 1 | 18 | 394 | |
| Oller | David Samuel | 1885 | Portland 2 | 19 | 4167 | |
| Olles | Hubert Peter | 1873 | Portland 2 | 19 | 4168 | |
| Olles | Hubert Thom | 1900 | Yamhill | 32 | 4391 | |
| Ollgard | Carl J | 1887 | Harney | 9 | 946 | |
| Ollgard | Guy E | 1891 | Harney | 9 | 947 | |
| Ollikkala | Gust | 1876 | Clatsop | 4 | 4210 | |
| Ollila | Edward Nicholas | 1896 | Columbia | 5 | 3337 | |
| Ollila | Henry Jafet | 1900 | Columbia | 5 | 3338 | |
| Ollila | John | 1885 | Clatsop | 4 | 4209 | |
| Ollila | Leonard | 1898 | Columbia | 5 | 3340 | |
| Ollim | Reuben Dee | 1881 | Portland 6 | 24 | 387 | |
| Ollivant | Elijah Fredrick | 1882 | Douglas | 8 | 1466 | |
| Ollivant | Eugene Herbert | 1873 | Douglas | 8 | 1464 | |
| Ollivant | George Elmer | 1884 | Douglas | 8 | 1465 | |
| Ollivant | Miles Earl | 1888 | Douglas | 8 | 1467 | |
| Ollivant | Ray Augusta | 1882 | Coos | 6 | 3793 | |
| Ollivant | Thomas Edmond | 1877 | Douglas | 8 | 1463 | |
| Olliver | Victor | 1886 | Linn | 13 | 2473 | |
| Olliver | William Edwin | 1879 | Portland 6 | 24 | 388 | |
| Ollman | John | 1876 | Columbia | 5 | 3339 | |
| Olmstad | Clarence Benson | 1875 | Portland 9 | 26 | 2740 | *Nel |
| Olmstead | Clarence Myrton | 1892 | Portland 2 | 19 | 4169 | |
| Olmstead | Clyde Arthur | 1888 | Marion 1 | 14 | 5002 | |
| Olmstead | Duncan McDonald | 1893 | Yamhill | 32 | 4392 | |
| Olmstead | Elmer Jess | 1900 | Douglas | 8 | 1468 | |
| Olmstead | Emery | 1874 | Portland 7 | 25 | 148 | |
| Olmstead | Frederic Arthur | 1882 | Portland 7 | 25 | 149 | |
| Olmstead | Leroy Daniel | 1875 | Grant | 8 | 5135 | |
| Olmstead | Samie Orrin | 1887 | Lake | 11 | 2543 | |
| Olmsted | Aaron Lemuel | 1892 | Wallowa | 30 | 3520 | |
| Olmsted | Clarance Henry | 1880 | Polk | 16 | 4849 | |
| Olmsted | Fred Louis | 1878 | Yamhill | 32 | 4393 | |
| Olmsted | Ralph Aubrey | 1889 | Yamhill | 32 | 4394 | |
| Olmsted | Samuel F | 1874 | Multnomah | 16 | 1755 | |
| Olmsted | Walter Manley | 1876 | Polk | 16 | 4850 | |
| Olney | Frank Denman | 1891 | Klamath | 11 | 439 | |
| Olney | Harry V | 1890 | Portland 9 | 26 | 2741 | *Nel |
| Olney | Joseph Benjamin | 1885 | Multnomah | 16 | 1756 | |
| Olney | William | 1878 | Portland 10 | 27 | 2726 | |
| Olney | William Rudolph | 1884 | Multnomah | 16 | 1757 | |
| Olnich | Antony | 1888 | Portland 10 | 27 | 2727 | |
| Olofson | Albert | 1893 | Harney | 9 | 948 | |
| Olofson | Gust | 1874 | Clatsop | 4 | 4212 | |
| Olofsson | Fritiof | 1882 | Clatsop | 4 | 4213 | |
| Olp | Chas Samuel | 1888 | Grant | 8 | 5138 | |
| Olp | Herman Frederick | 1881 | Grant | 8 | 5139 | |
| Olp | Julius Ludwig | 1897 | Grant | 8 | 5137 | |
| Olp | Robert Brookett | 1885 | Grant | 8 | 5141 | |
| Olp | William Montgomery | 1883 | Grant | 8 | 5140 | |
| Olsafsky | Peter | 1900 | Portland 4 | 21 | 5540 | |
| Olsauer | Lewellyn Merrill | 1877 | Portland 5 | 23 | 36 | |
| Olsen | Adolph | 1874 | Klamath | 11 | 444 |
