| Oronoko Township, MI (Township) |
| Oroville, CA (City) |
| Oroville, WA (City) |
| Orr, MN (City) |
| Orrick, MO (City) |
| Orrington, ME (Town) |
| Orrock, MN (Township) |
| Orrstown, PA (Borough) |
| Orrum, NC (Town) |
| Orrville, AL (Town) |
| Orrville, OH (City) |
| Orthel Township, IA (Township) |
| Orthell, ND (Township) |
| Orting, WA (City) |
| Ortley, SD (Township) |
