| Castalia, OH (Village) |
| Castalia, NC (Town) |
| Castalia, IA (City) |
| Castana, IA (City) |
| Castanea Township, PA (Township) |
| Castile, NY (Town) |
| Castile, NY (Village) |
| Castine, OH (Village) |
| Castine, ME (Town) |
| Castle, KS (Township) |
| Castle, OK (Town) |
| Castle Butte, SD (Township) |
| Castle Butte, SD (Township) |
| Castle Dale, UT (City) |
| Castle Grove Township, IA (Township) |
