| Decatur County, IA (County) |
| Decatur County, IN (County) |
| Decatur County, TN (County) |
| Decatur County, GA (County) |
| Decatur Town, WI (Town) |
| Decatur Township, MI (Township) |
| Decatur Township, OH (Township) |
| Decatur Township, OH (Township) |
| Decatur Township, PA (Township) |
| Decatur Township, PA (Township) |
| Decatur Township, IA (Township) |
| Decatur Township, IL (Township) |
| Decaturville, TN (Town) |
| Decherd, TN (City) |
| Decker, IN (Town) |
