California Neighborhoods R
- Racquet Club Estates (18)
- Racquet Club South (4)
- Racquet Club West (18)
- Ramblewood (2)
- Ramona (25)
- Ramona (5)
- Rampart Village (42)
- Rancho Adjacent (19)
- Rancho Bella Vista (7)
- Rancho Bernardo (58)
- Rancho Cordova North (2)
- Rancho Cucamonga (2)
- Rancho Fontana (2)
- Rancho Niguel (11)
- Rancho Park (22)
- Rancho Penasquitos (33)
- Rancho Ramon (3)
- Rancho Rinconada (3)
- Rancho San Joaquin (2)
- Rancho Santa Teresa (2)
- Rancho West (2)
- Rancho-Del Rey (10)
- Ray Park (2)
- Raymond Hill (1)
- Raynor Park (3)
- Redhawk (14)
- Redwood Estates (1)
- Redwood Heights (13)
- Redwood Oaks (3)
- Redwood Shores (17)
- Redwood Village (2)
- Redwood Village-Rolando Park (9)
- Renaissance (5)
- Republic Homes (2)
- Reservoir Hill (4)
- Rexland Acres (2)
- Reyes Adobe (1)
- Rheem Valley Manor (1)
- Rialto Airport (1)
- Richland Farms (1)
- Richmond American Homes (1)
- Richmond Annex (4)
- Richmond District (24)
- Richmond Grove (9)
- Ridgeview-Webster (3)
- Rincon (18)
- Rio Bravo (3)
- River District (2)
- River Oaks (4)
- Riverglen (1)
- Riverlakes (9)
- Riverpoint (1)
- Riverside (1)
- Riverside Airport (7)
- Riverside Rancho (9)
- Riverside Valley Home Gardens (1)
- Riverview (1)
- Riverview (2)
- Riverview Office Park (1)
- Riverview West (4)
- Riverwalk (7)
- Riviera (1)
- Riviera (17)
- Riviera/Westchester (14)
- Roberts-Walnut Woods (1)
- Robinhood-Bon Vivant (2)
- Robinson Ranch (1)
- Robla (3)
- Rockaway Beach (1)
- Rockridge (7)
- Roeding Park (12)
- Rolando (22)
- Rolling Hills (2)
- Rolling Hills Ranch (2)
- Roosevelt (3)
- Roosevelt (6)
- Roripaugh Ranch (6)
- Rose Garden (1)
- Rose Garden (2)
- Rose Glen (2)
- Rose-Sartorette (1)
- Rosebank (1)
- Rosemont (20)
- Roseville Heights (2)
- Roseville-Fleet Ridge (14)
- Rosewood Baker (2)
- Rossmoor (3)
- Rossmoyne (12)
- Royal Oaks (1)
- RP Sports Complex (10)
- Rubidoux (10)
- Russian Hill (16)
- Ruth Hardy Park (8)