Barrios de California I
- Idyllwild Mountain Park (2)
- Indian Canyons (6)
- Industrial Area West (2)
- Ingleside (3)
- Ingleside Heights (3)
- Ingleside Terrace (2)
- Inner Parkside (4)
- Inner Sunset (7)
- Interland/Univ Research Park (2)
- Iron Triangle (2)
- Irvine Business Complex (66)
- Irvine Spectrum (42)
- Irvine Terrace (1)
- Irvington (7)
- Isla Vista (18)
- Ivey Ranch-Rancho Del Oro (16)
- Iveywood (3)
- Ivy Hill (6)