This list of cities, towns, unincorporated communities, counties, and other recognized places in the U.S. state of Alaska also includes information on the number and names of counties in which the place lies, and its lower and upper zip code bounds, if applicable.
| Name of place | Number of counties | Principal county | Lower zip code | Upper zip code |
|---|---|---|---|---|
| Icy Bay | 1 | Valdez-Cordova Census Area | ||
| Iditarod | 1 | Yukon-Koyukuk Census Area | ||
| Iditarod Area Regional Educational Attendance Area | 2 | Bethel Census Area | ||
| Iditarod Area Regional Educational Attendance Area | 2 | Yukon-Koyukuk Census Area | ||
| Igiak | 1 | Kusilvak Census Area | ||
| Igiugig | 1 | Lake and Peninsula Borough | 99613 | |
| Igloo | 1 | Nome Census Area | ||
| Igushik | 1 | Dillingham Census Area | ||
| Ikatan | 1 | Aleutians East Borough | 99583 | |
| Iliamna | 1 | Lake and Peninsula Borough | 99606 | |
| Iliamna Airport | 1 | Lake and Peninsula Borough | 99606 | |
| Inalik | 1 | Nome Census Area | ||
| Indian | 1 | Municipality of Anchorage | 99540 | |
| Indian Mountain | 1 | Yukon-Koyukuk Census Area | 99745 | |
| Indian Village | 1 | Southeast Fairbanks Census Area | ||
| Inger | 1 | Bethel Census Area | ||
| Ingrihak | 1 | Kusilvak Census Area | ||
| Iniskin | 1 | Kenai Peninsula Borough | ||
| Iron Creek | 1 | Nome Census Area | ||
| Island Homes | 1 | Fairbanks North Star Borough | 99701 | |
| Itulilik | 1 | Bethel Census Area | ||
| Ivanof Bay | 1 | Lake and Peninsula Borough | 99502 |