Barrios de California R
- Racquet Club Estates (16)
- Racquet Club South (3)
- Racquet Club West (17)
- Rafael Meadows-Los Ranchitos (1)
- Ramblewood (3)
- Ramona (10)
- Ramona (18)
- Rampart Village (29)
- Rancho Adjacent (25)
- Rancho Bella Vista (4)
- Rancho Bernardo (50)
- Rancho Cucamonga (1)
- Rancho Fontana (1)
- Rancho Niguel (7)
- Rancho Park (12)
- Rancho Penasquitos (34)
- Rancho Ramon (3)
- Rancho Rinconada (3)
- Rancho San Diego (12)
- Rancho San Joaquin (7)
- Rancho Santa Teresa (3)
- Rancho West (1)
- Rancho-Del Rey (8)
- Ray Park (1)
- Raynor Park (1)
- Redhawk (12)
- Redwood Heights (10)
- Redwood Oaks (5)
- Redwood Shores (14)
- Redwood Village-Rolando Park (11)
- Renaissance (4)
- Republic Homes (1)
- Reservoir Hill (1)
- Rexland Acres (4)
- Richland Farms (1)
- Richmond Annex (6)
- Richmond District (41)
- Richmond Grove (9)
- Ridgeline (1)
- Ridgeview-Webster (4)
- Rincon (42)
- Rio Bravo (4)
- River District (2)
- River Oaks (1)
- River Oaks (2)
- Riverglen (1)
- Riverlakes (3)
- Riverpoint (1)
- Riverside (1)
- Riverside Airport (5)
- Riverside Rancho (5)
- Riverside Valley Home Gardens (1)
- Riverview (2)
- Riverview (3)
- Riverview Office Park (2)
- Riverview West (5)
- Riverwalk (4)
- Riviera (1)
- Riviera (15)
- Riviera/Westchester (10)
- Robinhood-Bon Vivant (1)
- Robinson Ranch (1)
- Robla (4)
- Rockridge (1)
- Roeding Park (12)
- Rolando (15)
- Rolling Hills (5)
- Rolling Hills Ranch (2)
- Roosevelt (2)
- Roosevelt (8)
- Roripaugh Ranch (2)
- Rose Garden (1)
- Rose Garden (1)
- Rose Glen (1)
- Rose Park (1)
- Rose-Sartorette (4)
- Rosebank (2)
- Rosemont (19)
- Roseville-Fleet Ridge (17)
- Rosewood Baker (1)
- Rossmoyne (12)
- Royal Oaks (1)
- RP Sports Complex (8)
- Rubidoux (4)
- Rudgear Meadows (1)
- Russian Hill (12)
- Ruth Hardy Park (6)