| Plain Township, OH (Township) |
| Plain Township, OH (Township) |
| Plain Township, OH (Township) |
| Plain Village, WI (Village) |
| Plainfield, SD (Township) |
| Plainfield, OH (Village) |
| Plainfield, IL (Village) |
| Plainfield, NY (Town) |
| Plainfield, IA (City) |
| Plainfield, MA (Town) |
| Plainfield, IN (Town) |
| Plainfield, VT (Town) |
| Plainfield, NH (Town) |
| Plainfield, CT (Town) |
| Plainfield City, NJ (City) |
