Barrios de California I
- Idyllwild Mountain Park (5)
- Indian Canyons (4)
- Industrial Area West (3)
- Ingleside (5)
- Ingleside Heights (1)
- Ingleside Terrace (3)
- Inner Sunset (6)
- Interland/Univ Research Park (2)
- Iron Triangle (10)
- Irvine Business Complex (68)
- Irvine Spectrum (38)
- Irvington (9)
- Ivey Ranch-Rancho Del Oro (17)
- Iveywood (7)
- Ivy Drive Area (1)
- Ivy Hill (3)