Barrios de California I
- Idyllwild Mountain Park (1)
- Imperial Beach (66)
- Indian Canyons (3)
- Industrial Area West (2)
- Ingleside (2)
- Ingleside Heights (3)
- Inglewood (119)
- Ingold-Milldale (1)
- Inner Parkside (1)
- Inner Sunset (8)
- Interland/Univ Research Park (2)
- Iron Triangle (4)
- Irvine Business Complex (69)
- Irvine Spectrum (41)
- Irvington (8)
- Isla Vista (10)
- Islenair (1)
- Ivey Ranch-Rancho Del Oro (14)
- Iveywood (1)
- Ivy Drive Area (2)
- Ivy Hill (1)