California Neighborhoods R
- Racquet Club Estates (20)
- Racquet Club South (4)
- Racquet Club West (18)
- Rafael Meadows-Los Ranchitos (1)
- Ramona (11)
- Ramona (15)
- Rampart Village (29)
- Rancho Adjacent (26)
- Rancho Bella Vista (6)
- Rancho Bernardo (85)
- Rancho Cordova North (1)
- Rancho Cucamonga (2)
- Rancho Fontana (3)
- Rancho Niguel (13)
- Rancho Park (24)
- Rancho Penasquitos (52)
- Rancho Ramon (1)
- Rancho Rinconada (8)
- Rancho San Joaquin (5)
- Rancho San Miguel (1)
- Rancho San Rafael (1)
- Rancho Santa Teresa (4)
- Rancho West (2)
- Rancho-Del Rey (13)
- Ray Park (1)
- Raymond Hill (2)
- Raynor Park (6)
- Redhawk (12)
- Redwood Estates (1)
- Redwood Heights (12)
- Redwood Oaks (4)
- Redwood Shores (19)
- Redwood Village (1)
- Redwood Village-Rolando Park (14)
- Renaissance (3)
- Reservoir Hill (4)
- Rex Manor (1)
- Rexland Acres (3)
- Reyes Adobe (1)
- Rheem Blvd Area (2)
- Rheem Valley Manor (1)
- Richland Farms (1)
- Richmond American Homes (1)
- Richmond Annex (5)
- Richmond District (24)
- Richmond Grove (9)
- Ridgeview-Webster (4)
- Rimer Area (2)
- Rincon (29)
- Rio Bravo (3)
- River District (2)
- River Oaks (4)
- Riverglen (1)
- Riverlakes (7)
- Riverside (1)
- Riverside Airport (8)
- Riverside Rancho (9)
- Riverside Valley Home Gardens (1)
- Riverview (1)
- Riverview (5)
- Riverview Office Park (1)
- Riverview West (12)
- Riverwalk (7)
- Riviera (16)
- Riviera (2)
- Riviera/Westchester (9)
- Robinhood-Bon Vivant (2)
- Robla (6)
- Rockridge (4)
- Rockspring (1)
- Roeding Park (11)
- Rogers (1)
- Rolando (19)
- Rolling Hills (3)
- Rolling Hills Ranch (1)
- Roosevelt (10)
- Roosevelt (4)
- Roripaugh Ranch (2)
- Rose Garden (2)
- Rose Glen (4)
- Rose-Sartorette (1)
- Rosebank (1)
- Rosemont (22)
- Roseville-Fleet Ridge (14)
- Rosewood Baker (1)
- Rossmoyne (22)
- Rousch (1)
- Royal Oaks (1)
- RP Sports Complex (12)
- Rubidoux (19)
- Rudgear Estates (1)
- Russian Hill (14)
- Ruth Hardy Park (5)