| Middleport, OH (Village) |
| Middleport, PA (Borough) |
| Middleport Township, IL (Township) |
| Middlesborough, KY (City) |
| Middlesex, VT (Town) |
| Middlesex, NY (Town) |
| Middlesex, NC (Town) |
| Middlesex, NJ (Borough) |
| Middlesex County, NJ (County) |
| Middlesex County, VA (County) |
| Middlesex County, CT (County) |
| Middlesex County, MA (County) |
| Middlesex Township, PA (Township) |
| Middlesex Township, PA (Township) |
| Middleton, WI (City) |
