| Name | Location 1 | Location 2 | Notes |
|---|---|---|---|
| O'Brien, Katie Lizzie | 10 | 153 | [Co-p186,l33"O'Brien, Elizabeth C"1-6-0POB"Stillwater"f"Wm"m"Mary Ann"] |
| O'Brien, Sarah Mabel | 61 | 959 | |
| O'Donald, James | 27 | 415 | "Lumberman" [Co-p195,l37 |
| O'Gorman, J J | 18 | 245 | [Co-p190,l2 |
| Oldani, John | 147 | 1983 | |
| Oldani, Louisa | 184 | 2392 | |
| Oleson, Ada Emelie | 5 | 81 | [Co-p185,l6"Oleson, Ada Amelia"DOD"May 28 1884"POB"Stillwater"f"Frank"m"Mary"] |
| Oleson, Andrew | 5 | 83 | "Carriage trimmer" [Co-p185,l7"Olson, Andrew"49-0-0f"Ole"m"Christine"] |
| Oleson, Andrew E | 7 | 103 | [Co-p185,l25"Olson, Andrew"f"Andrew"m"Eugene"] |
| Oleson, Carl | 176 | 2280 | |
| Oleson, Elbert | 136 | 1861 | |
| Oleson, infant | 173 | 2251 | |
| Oleson, infant, male | 7 | 98 | "(Infant of James O."); [not listed in the county record?] |
| Oleson, infant, male | 157 | 2082 | |
| Oleson, Maria | 173 | 2257 | |
| Oleson, Mary | 5 | 70 | "Housewife" [Co-p184,l38] |
| Oleson, Ole Martin | 4 | 54 | [Co-p184,l23"Olson, Ole Martin"f"Halvor"m"Helen"] |
| Olney, Hezekiah | 131 | 1789 | |
| Olsen, Andrew A | 29 | 444 | written as "Olsen And. A." [Co-p196,l33 |
| Olsen, Christine | 129 | 1759 | |
| Olsen, Hattie O | 44 | 671 | |
| Olsen, John | 33 | 513 | written as: "Olsen Jno." |
| Olsen, Martha | 52 | 764 | |
| Olsen, William Oliver | 34 | 535 | |
| Olson, Anna Louisa | 27 | 402 | "Music teacher" [Co-p195,l24 |
| Olson, Arthur E | 9 | 131 | [Co-p186,l9POB"U S of A"f"Edward A"m"Elizabeth"] |
| Olson, Edward | 64 | 997 | |
| Olson, Ellen C | 65 | 1011 | |
| Olson, Erick | 47 | 688 | |
| Olson, infant, male | 77 | 1142 | written as: "Olson Swen - Infant of" |
| Olson, infant, male | 176 | 2284 | |
| Olson, Matilda | 188 | 2441 | |
| Olson, Nellie | 29 | 440 | [Co-p196,l29 [CoRet-l51parents"Christ + Annie"] |
| Olson, Nels | 132 | 1800 | |
| Olson, Nels | 188 | 2439 | |
| Olson, Oscar Benjamin | 113 | 1571 | |
| Olson, Simon | 49 | 711 | occupation: "Lab." |
| Olstad, Andrew | 52 | 771 | |
| Olstad, infant, female | 163 | 2138 | |
| Olstrom, Ellen C | 65 | 1009 | |
| Olstrom, Mary | 55 | 860 | |
| Olstrom, Mary F | 17 | 235 | [Co-p189,l31 |
| O'Neal, Agnes | 94 | 1341 | |
| O'Neal, Frank | 180 | 2348 | |
| O'Neal, James Cardinal | 101 | 1437 | |
| O'Neal, Mary Stella | 180 | 2349 | |
| Organ, Mrs. Pierce | 118 | 1635 | |
| Organ, Perry | 144 | 1957 | |
| Organ, Thomas C | 78 | 1145 | OCC:"Laborer" |
| Oscar, infant, male | 178 | 2325 |