1920 Farm Directory
| Oberts, James | Emma Glodo |
| O'Daniel, George W | Anna Zerban |
| O'Daniel, Ronald R | |
| Oden, Roy J | Lillie Qualls |
| Oetjen, Fred | Anna Weseloh |
| Oetjen, Martin | Minnie Wesloh |
| Oetking, Karl | Lena Husemann |
| Oliver, Chapman | Caroline Latty |
| Oliver, Charles | Rosa Coleman |
| Osburn, William D | Jane Howerton |
| Otersen, Henry F | Sophia Meyerhoff |
| Outlan, John | Julia Fleming |
| Outlan, L | Ella Hannah |
| Owens, Thomas | Eva Hepp |
| Ozburn, Claude M | Imogene Stewart |