| Foster City, CA (City) |
| Foster County, ND (County) |
| Foster Town, WI (Town) |
| Foster Township, MI (Township) |
| Foster Township, PA (Township) |
| Foster Township, PA (Township) |
| Foster Township, PA (Township) |
| Foster Township, IL (Township) |
| Foster Township, IL (Township) |
| Fostoria, IA (City) |
| Fostoria, OH (City) |
| Fouke, AR (City) |
| Founders Ridge Community Development District, FL (CDD) |
| Fountain, KS (Township) |
| Fountain, MN (City) |
