| Olivia, ND (Township) |
| Olivia, MN (City) |
| Olla, LA (Town) |
| Ollie, IA (City) |
| Olmitz, KS (City) |
| Olmos Park, TX (City) |
| Olmsted, IL (Village) |
| Olmsted County, MN (County) |
| Olmsted Falls, OH (City) |
| Olmsted Township, OH (Township) |
| Olney, TX (City) |
| Olney, MN (Township) |
| Olney, IL (City) |
| Olney Springs, CO (Town) |
| Olney Township, IL (Township) |
