Admitted to the Union on January 3, 1959 as the 49th state.
- As the Territory of Alaska, 1880 – 1890 federal censuses are lost.
- 1900—1940 federal censuses are extant for all counties.
| Aleutians East | Aleutians West | Anchorage | Bethel |
| Bristol Bay | Denali | Dillingham | Fairbanks North Star |
| Haines | Juneau | Kenai Peninsula | Ketchikan Gateway |
| Kodiak Island | Lake And Peninsula | Matanuska-Susitna | Nome |
| North Slope | Northwest Arctic | Prince of Wales-Outer Ketchikan | Sitka |
| Skagway | Southeast Fairbanks | Valdez-Cordova | Wade Hampton |
| Wrangell | Yakutat |