- Pawcatuck (Population: 5,474)
- Plainfield (Population: 14,619)
- Plainfield Village (Population: 2,638)
- Plainville (Population: 17,328)
- Plymouth (Population: 11,634)
- Pomfret (Population: 3,798)
- Poquonock Bridge (Population: 1,592)
- Portland (Population: 8,732)
- Preston (Population: 4,688)
- Prospect (Population: 8,707)
- Putnam (Population: 9,002)
- Putnam District (Population: 6,746)
