Barrios de California I
- Idyllwild Mountain Park (10)
- Indian Canyons (4)
- Industrial Area West (4)
- Ingleside (1)
- Ingleside Heights (7)
- Ingold-Milldale (7)
- Inner Sunset (8)
- Interland/Univ Research Park (2)
- Iron Triangle (6)
- Irvine Business Complex (59)
- Irvine Spectrum (54)
- Irvington (9)
- Ivey Ranch-Rancho Del Oro (20)
- Iveywood (3)
- Ivy Drive Area (1)
- Ivy Hill (4)