| OTC Community Development District, FL (CDD) |
| Otego, NY (Town) |
| Otego, NY (Village) |
| Otego Township, IL (Township) |
| Oteneagen, MN (Township) |
| Otero County, CO (County) |
| Otero County, NM (County) |
| Othello, WA (City) |
| Otho, IA (City) |
| Otho Township, IA (Township) |
| Otis, KS (City) |
| Otis, MA (Town) |
| Otis, ND (Township) |
| Otis, ME (Town) |
| Otis, CO (Town) |
