| Riverdale, NE (Township) |
| Riverdale, UT (City) |
| Riverdale, ND (City) |
| Riverdale, ND (Township) |
| Riverdale, IL (Village) |
| Riverdale, MN (Township) |
| Riverdale, IA (City) |
| Riverdale, NJ (Borough) |
| Riverdale Park, MD (Town) |
| Riverdale Township, IA (Township) |
| Rivergrove, OR (City) |
| Riverhead, NY (Town) |
| Riverlea, OH (Village) |
| RiverPark Community Development District, FL (CDD) |
| Rivers Edge Community Development District, FL (CDD) |
