City | 2024 Population |
|---|---|
| Idlewild | 96 |
| Idyllwild-Pine Cove | 4,019 |
| Igo | 42 |
| Imperial | 21,965 |
| Imperial Beach | 25,243 |
| Independence | 939 |
| Indian Wells | 4,888 |
| Indianola | 711 |
| Indio | 94,302 |
| Indio Hills | 685 |
| Industry | 254 |
| Inglewood | 101,355 |
| Interlaken | 7,959 |
| Inverness | 1,441 |
| Inyokern | 1,052 |
| Ione | 5,527 |
| Iron Horse | 546 |
| Irvine | 316,691 |
| Irwindale | 1,413 |
| Isla Vista | 13,711 |
| Isleton | 770 |
| Ivanhoe | 4,293 |