Barrios de California I
- Idyllwild Mountain Park (5)
- Indian Canyons (4)
- Industrial Area West (4)
- Ingleside (1)
- Ingleside Heights (3)
- Ingold-Milldale (6)
- Inner Sunset (5)
- Interland/Univ Research Park (2)
- Iron Triangle (10)
- Irvine Business Complex (62)
- Irvine Spectrum (35)
- Irvington (9)
- Ivey Ranch-Rancho Del Oro (23)
- Iveywood (4)
- Ivy Hill (3)