| Middletown, IA (City) |
| Middletown, MD (Town) |
| Middletown, MO (City) |
| Middletown, CT (City) |
| Middletown, DE (Town) |
| Middletown, RI (Town) |
| Middletown, KY (City) |
| Middletown, IN (Town) |
| Middletown Springs, VT (Town) |
| Middletown Township, PA (Township) |
| Middletown Township, PA (Township) |
| Middletown Township, PA (Township) |
| Middletown Township, NJ (Township) |
| Middleville, MI (Village) |
| Middleville, NY (Village) |
