| Obaig, Frederick | 1856 | O-35 | 263 | ||
| Obberger, John | 1880 | N--4 | 433 | ||
| Oberhelmann, Adolph | 1839 | 28 | 101 | ||
| Oberhelmann, Henry | 1840 | O-28 | 276 | ||
| Oberman, August | 1855 | D--1 | 80 | ||
| Oberman, August | 1858 | O-36 | 354 | ||
| Oberman, Charles | 1879 | N--4 | 150 | ||
| Oberman, Henry | 1851 | O-31 | 482 | ||
| Obermann, August | 855 | D--1 | 80 | ||
| Obermann, Henry | 1849 | O-31 | 142 | ||
| O'Brien. Michael | 1854 | O-33 | 406 | ||
| O'Brien, Thomas | 1857 | O-35 | 323 | ||
| O'Brian. William | 1854 | D--1 | 21 | ||
| Ochs, Isaac | 1852 | O-32 | 168 | ||
| O'Connell, Mathew | 1860 | O-38 | 219 | ||
| O'Connell, Patrick | 1863 | O-32 | 497 | ||
| O'Connell, William | 1856 | O-35 | 82 | ||
| O'Connor, Philip | 1837 | O-27 | 195 | ||
| O'Connor, Phillip | 1839 | O-28 | 65 | ||
| O'Day, Pat | 1876 | N--3 | 107 | ||
| O'Donnell, Daniel | 1880 | N--4 | 502 | ||
| O'Donnell. James | 1852 | O-32 | 101 | ||
| O'Donnell, James | 1854 | O-33 | 446 | ||
| O'Donnell, John | 1856 | O-34 | 390 | ||
| O'Donnell, John | 1878 | N--4 | 45 | ||
| O'Donnell, John | 1880 | N--4 | 491 | ||
| O'Donnell, Michael | 1855 | D--1 | 61 | ||
| Oerlap, Frederick | 1844 | O-29 | 341 | ||
| Oesterling, John | 1852 | O-320 | 168 | ||
| O'Hara, Lawrence | 1836 | O-270 | 151 | ||
| O'Harra, Lawrence | 1832 | O-250 | 274 | ||
| O'Harrah, John | 1856 | D--1 | 93 | ||
| Ohio, Christian | 1836 | O-270 | 26 | ||
| Oble, Christian | 1840 | O-280 | 292 | ||
| Ohle, Henry | 1845 | O-290 | 566 | ||
| Ohio, Henry | 1848 | O-300 | 447 | ||
| O'Leary, Daniel | 1878 | N--4 | 70 | ||
| O'Leary, David | 1878 | N--4 | 65 | ||
| Oltpeter, Frederick | 1851 | O-31 | 502 | ||
| Oltpeter, Frederick | 1856 | O-35 | 170 | ||
| O'Malia, Daniel | 1855 | D--1 | 66 | ||
| O'Neal. Charles | 1852 | O-32 | 168 | ||
| O'Neil, Felix | 1839 | O-28 | 64 | ||
| O'Neil, Michael | 1854 | O-33 | 197 | ||
| O'Neill, Charles | 1856 | O-35 | 64 | ||
| Oppenheimer, Isaac | 1853 | O-33 | 28 | ||
| Oppenheimer, Segman | 1855 | O-34 | 335 | ||
| Opperman, Frederick | 1859 | D--1 | 143 | ||
| O'Reilly, John | 1857 | O-35 | 328 | ||
| O'Rielly, James | 1855 | D--1 | 83 | ||
| O'Rielly, Thomas | 1857 | O-35 | 326 | ||
| O'Riley, Miles | 1835 | O-26 | 354 | ||
| O'Riley, Miles | 1843 | O-29 | 206 | ||
| O'Riley, Thomas | 1857 | O-35 | 326 | ||
| O'Rourke, Arthur | 1856 | D--1 | 85 | ||
| Orth, Lewis | 1852 | O-32 | 214 | ||
| Orth, Lewis | 1855 | O-34 | 199 | ||
| Oser, Fridalin | 1879 | N--4 | 128 | ||
| Oshe, Jacob | 1836 | O-27 | 26 | ||
| Osterling, John | 1854 | O-33 | 462 | ||
| Osterman, Sherrod | 1848 | O-31 | 18 | ||
| Ostreigh, John | 1840 | O-28 | 286 | ||
| Ostreigh, John | 1844 | O-29 | 347 | ||
| Otis, Alexander | 1879 | N--4 | 318 | ||
| Oppenheimer, Henry | 1851 | O-31 | 385 | ||
| Otterson, William | 1843 | O-29 | 200 | ||
| Otto, Charles | 1854 | O-33 | 215 | ||
| Otto, Henry | 1856 | O-35 | 108 | ||
| Otto, Immanuel A. | 1852 | O-32 | 148 | ||
| Otto, Lewis | 1860 | O-38 | 63 | ||
| Ouihl, Lorenz | 1852 | O-32 | 276 | ||
| Ouihl, Lorenz | 1856 | O-35 | 169 | ||
Typed by Frank Manning.
