| Portofino Vineyards Community Development District, FL (CDD) |
| Portofino Vista Community Development District, FL (CDD) |
| Portola, CA (City) |
| Portola Valley, CA (Town) |
| Portsmouth, VA (City) |
| Portsmouth, OH (City) |
| Portsmouth, RI (Town) |
| Portsmouth, NH (City) |
| Portsmouth, IA (City) |
| Portsmouth Township, MI (Township) |
| Portville, NY (Town) |
| Portville, NY (Village) |
| Porum, OK (Town) |
| Posen, MN (Township) |
| Posen, IL (Village) |
