| Name | Line | Page | District | Soundex
| Older, Frank | 92 | 7B | 1 | O436
| | Older, Sailas A. | 66 | 5B | 1 | O436
| | Olesen, Erick | 87 | 14B | 6 | O425
| | Olesen, Harold | 86 | 14B | 6 | O425
| | Olesen, Laura | 85 | 14B | 6 | O425
| | Oliver, Ralph W. | 71 | 4B | 3 | O416
| | Olsen, Albert | 75 | 5B | 5 | O425
| | Olsen, Alex | 28 | 16A | 6 | O425
| | Olsen, Alfred | 85 | 8B | 5 | O425
| | Olsen, Alvin | 24 | 14A | 5 | O425
| | Olsen, Annie Peterson | 32 | 13A | 5 | O425
| | Olsen, August | 29 | 13A | 5 | O425
| | Olsen, Dan F. | 89 | 2B | 7 | O425
| | Olsen, Dora | 89 | 16B | 6 | O425
| | Olsen, Hans N. | 71 | 13B | 6 | O425
| | Olsen, James P. | 36 | 17A | 6 | O425
| | Olsen, James | 6 | 13A | 6 | O425
| | Olsen, Janie | 90 | 16B | 6 | O425
| | Olsen, John C. | 88 | 12B | 6 | O425
| | Olsen, John F. | 94 | 13B | 5 | O425
| | Olsen, John P. | 92 | 9B | 16 | O425
| | Olsen, John | 88 | 14B | 6 | O425
| | Olsen, John | 21 | 3A | 6 | O425
| | Olsen, Laurine | 59 | 2B | 7 | O425
| | Olsen, Leslie John | 74 | 12B | 5 | O425
| | Olsen, Marvin E. | 6 | 1A | 6 | O425
| | Olsen, Melvin C. | 6 | 2A | 6 | O425
| | Olsen, N. Alfred | 11 | 18A | 6 | O425
| | Olsen, N. C. | 84 | 14B | 6 | O425
| | Olsen, Oliver W. | 80 | 2B | 4 | O425
| | Olsen, Rasmus | 31 | 16A | 6 | O425
| | Olsen, Rupert | 67 | 9B | 6 | O425
| | Olson, Adolph C. | 73 | 3B | 11 | O425
| | Olson, Agness | 71 | 7B | 10 | O425
| | Olson, Carl | 74 | 8B | 2 | O425
| | Olson, Christian | 58 | 15B | 7 | O425
| | Olson, Harriet | 38 | 10A | 7 | O425
| | Olson, J. R. | 4 | 22A | 7 | O425
| | Olson, Joseph R. | 14 | 17A | 7 | O425
| | Olson, Joseph | 73 | 3B | 8 | O425
| | Olson, Ludvig M. | 2 | 16A | 7 | O425
| | Olson, Marenus B. | 14 | 5A | 7 | O425
| | Olson, Marie | 5 | 21A | 11 | O425
| | Olson, Mary A. | 66 | 7B | 7 | O425
| | Olson, Ole | 73 | 7B | 15 | O425
| | Olson, Olof J. | 95 | 15B | 7 | O425
| | Olson, Orson L. | 1 | 8A | 1 | O425
| | Olson, Peter | 76 | 15B | 1 | O425
| | Olson, Scott | 29 | 7A | 15 | O425
| | Olson, Wilford L. | 74 | 22B | 7 | O425
| |