| Name | Location 1 | Location 2 | Notes |
|---|---|---|---|
| O'Leary, M T | 16 | Forest Lake, T32N, R21W, section 25 | |
| O'Leary, M T | 16 | Forest Lake, T32N, R21W, section 26 | |
| O'Leary, M T | 16 | Forest Lake, T32N, R21W, section 27 | |
| Olin, O | 6 | New Scandia, T32N, R20W, section 14 | |
| Olin, Ole | 7 | Scandia P.O., New Scandia Twp. | |
| Olin, Ole | 7 | Scandia P.O., New Scandia Twp. | |
| Olin, Ole | 7 | Scandia P.O., New Scandia Twp. | |
| Oliver, Geo. A | 57 | ||
| Oliver, Jno. | 57 | ||
| Olson, A | 6 | Est.; New Scandia, T32N, R20W, section 34 | |
| Olson, A | 6 | Est.; New Scandia, T32N, R20W, section 34 | |
| Olson, A M | 10 | May, T31N, R20W, section 21 | |
| Olson, A | 10 | May, T31N, R20W, section 36 | |
| Olson, A | 7 | Scandia P.O., New Scandia Twp. | |
| Olson, A | 6 | New Scandia, T32N, R20W, section 19 | |
| Olson, Andrew | 16 | Forest Lake, T32N, R21W, section 35 | |
| Olson, Andrew | 10 | May, T31N, R20W, section 6 | |
| Olson, C M | 6 | New Scandia, T32N, R20W, section 4 | |
| Olson, C M | 6 | New Scandia, T32N, R20W, section 2 | |
| Olson, Carl M | 58 | Town of New Scandia; Farmer, Otisville post office, section 2 | |
| Olson, Farmer | 58 | Town of Oakdale; Farmer, | |
| Olson, J S | 10 | May, T31N, R19W, section 19 | |
| Olson, J | 6 | New Scandia, T32N, R20W, section 12 | |
| Olson, J E | 16 | Forest Lake, T32N, R21W, section 34 | |
| Olson, J H | 6 | New Scandia, T32N, R20W, section 5 | |
| Olson, J H | 6 | New Scandia, T32N, R20W, section 9 | |
| Olson, Lena | 16 | Forest Lake, T32N, R21W, section 29 | |
| Olson, Liza M | 6 | New Scandia, T32N, R19W, section 6 | |
| Olson, Martin | 6 | New Scandia, T32N, R20W, section 11 | |
| Olson, N M | 16 | Forest Lake, T32N, R21W, section 21 | |
| Olson, N M | 57 | ||
| Olson, O | 10 | May, T31N, R20W, section 16 | |
| Olson, O | 10 | May, T31N, R20W, section 10 | |
| Olson, Otto | 57 | ||
| Olson, Peter | 6 | New Scandia, T32N, R20W, section 24 | |
| O'Mara, J | 14 | Oneka, T31N, R21W, section 2 | |
| O'Mara, John | 10 | May, T31N, R20W, section 31 | |
| O'Mara, John | 10 | May, T31N, R20W, section 31 | |
| O'Mara, John | 10 | May, T31N, R20W, section 32 | |
| Orcutt, I H | 16 | Forest Lake, T32N, R21W, section 31 | |
| Orcutt, I H | 16 | Forest Lake, T32N, R21W, section 19 | |
| Orcutt, I H | 16 | Forest Lake, T32N, R21W, section 30 | |
| Organ, Thos. | 10 | May, T31N, R20W, section 31 | |
| Osberg, Olaf | 10 | May, T31N, R20W, section 13 | |
| Osberg, Olof | 10 | May, T31N, R19W, section 18 | |
| Otterdahl, E | 17 | Stillwater, T30N, R20W, section 4 | |
| Otterdahl, Erik | 58 | Town of Stillwater; Farmer, Stillwater post office, section 4 | |
| Otterdahl, John | 17 | Stillwater, T30N, R20W, section 5 | |
| Otterdahl, John | 17 | Stillwater, T30N, R20W, section 4 | |
| P, H | 16 | Forest Lake, T32N, R21W, section 16 |