- Inskip
- Independence, Rail Rd Flat
- Indian Creek
- Indian Hills
- Idlewild
- Idria
- Idyllwild
- Ignacio
- Igo
- Ingot
- Inwood
- Irwin
- Island Mountain
- Ivanpah
- Ingle
- Island Number One
- Ivesta
- Ideal Mobile Home Park
- Indian Island
- Indianola
- Indianola
- Inperial Gables
- Iris
- Indian Village
- Ilmon
- Indian Island
- Indian Rock
- Indian Springs
- Island Chaffee
- Island Grissom