| Waterloo, IN (Town) |
| Waterloo, IN (Township) |
| Waterloo, SC (Town) |
| Waterloo, KS (Township) |
| Waterloo, ND (Township) |
| Waterloo, WI (City) |
| Waterloo, IL (City) |
| Waterloo, NY (Village) |
| Waterloo, AL (Town) |
| Waterloo, NY (Town) |
| Waterloo, IA (City) |
| Waterloo Town, WI (Town) |
| Waterloo Town, WI (Town) |
| Waterloo Township, MI (Township) |
| Waterloo Township, OH (Township) |
