Barrios de California R
- Racquet Club Estates (15)
- Racquet Club South (1)
- Racquet Club West (13)
- Ramblewood (2)
- Ramona (21)
- Ramona (5)
- Rampart Village (31)
- Rancho Adjacent (19)
- Rancho Bella Vista (6)
- Rancho Bernardo (56)
- Rancho Cucamonga (2)
- Rancho Fontana (1)
- Rancho Niguel (10)
- Rancho Park (9)
- Rancho Penasquitos (35)
- Rancho Ramon (2)
- Rancho Rinconada (3)
- Rancho San Diego (7)
- Rancho San Joaquin (4)
- Rancho San Rafael (1)
- Rancho Santa Teresa (2)
- Rancho West (1)
- Rancho-Del Rey (8)
- Ray Park (1)
- Raymond Hill (3)
- Raynor Park (3)
- Redhawk (7)
- Redwood (1)
- Redwood Heights (9)
- Redwood Oaks (4)
- Redwood Shores (14)
- Redwood Village-Rolando Park (10)
- Renaissance (3)
- Republic Homes (2)
- Reservoir Hill (2)
- Rexland Acres (6)
- Rhapsody (1)
- Richmond Annex (5)
- Richmond District (30)
- Richmond Grove (6)
- Richmond Ranch (1)
- Ridgeview-Webster (3)
- Rincon (40)
- Rio Bravo (2)
- River District (2)
- River Oaks (2)
- River Oaks (7)
- Riverglen (1)
- Riverlakes (2)
- Riverside (2)
- Riverside Airport (5)
- Riverside Rancho (3)
- Riverside Valley Home Gardens (1)
- Riverview (1)
- Riverview (7)
- Riverview Office Park (2)
- Riverview West (8)
- Riverwalk (4)
- Riviera (2)
- Riviera (8)
- Riviera/Westchester (7)
- Robla (3)
- Rockridge (5)
- Roeding Park (15)
- Rolando (15)
- Rolling Hills (4)
- Rolling Hills Ranch (2)
- Roosevelt (3)
- Roosevelt (6)
- Roripaugh Ranch (5)
- Rose Garden (1)
- Rose Garden (2)
- Rose Glen (3)
- Rose Park (1)
- Rosebank (2)
- Rosemary Garden (1)
- Rosemont (14)
- Rosemont Square (2)
- Roseville Heights (1)
- Roseville-Fleet Ridge (16)
- Rosewood Baker (2)
- Rossmoor (3)
- Rossmoyne (11)
- Royal Oaks (1)
- RP Sports Complex (11)
- Rubidoux (8)
- Ruskin (2)
- Russian Hill (17)
- Ruth Hardy Park (4)
- Ryan Tract (1)