- Pacheco
- Pacific Grove
- Pacifica
- Pajaro
- Palermo
- Palm Desert
- Palm Springs
- Palmdale
- Palo Alto
- Palo Cedro
- Palo Verde
- Palos Verdes Estates
- Panorama Heights
- Paradise
- Paradise Park
- Paramount
- Parkfield
- Parksdale
- Parkway
- Parkwood
- Parlier
- Pasadena
- Pasatiempo
- Paskenta
- Paso Robles
- Patterson
- Patterson Tract
- Patton Village
- Paxton
- Paynes Creek
- Pearsonville
- Pedley
- Penn Valley
- Penngrove
- Penryn
- Perris
- Pescadero
- Petaluma
- Peters
- Phelan
- Phillipsville
- Philo
- Phoenix Lake
- Pico Rivera
- Piedmont
- Pierpoint
- Pike
- Pine Flat
- Pine Grove
- Pine Hills
- Pine Mountain Club
- Pine Mountain Club
- Pine Valley
- Pinole
- Piñon Hills
- Pioneer
- Piru
- Pismo Beach
- Pittsburg
- Pixley
- Placentia
- Placerville
- Plainview
- Planada
- Pleasant Hill
- Pleasanton
- Plumas Eureka
- Plumas Eureka (historical)
- Plumas Lake
- Plymouth
- Point Arena
- Point Reyes Station
- Pollock Pines
- Pomona
- Ponderosa
- Poplar-Cotton Center
- Port Costa
- Port Hueneme
- Porterville
- Portola
- Portola Hills
- Portola Valley
- Posey
- Poso Park
- Potrero
- Potter Valley
- Poway
- Prattville
- Princeton
- Proberta
- Prunedale
