| Name of County
|
Date Formed
|
Boundary
Changes
|
Parent County
|
Counties Created by Boundary Changes
|
| Aleutians East
|
1987 Oct 23
|
Details
|
Aleutian Islands Census Area
|
|
| Aleutians West Census Area
|
1987 Oct 23
|
Details
|
Aleutian Islands Census Area
|
|
| Anchorage
|
1964 Jan 01
|
Details
|
|
|
| Bethel Census Area
|
|
Details
|
|
|
| Bristol Bay
|
1962
|
Details
|
|
|
| Denali
|
1990 Dec 07
|
Details
|
Yukon-Koyukuk and Southeast Fairbanks Census Areas
|
|
| Fairbanks North Star
|
1964 Jan 1
|
Details
|
|
|
| Haines
|
1968 Aug 29
|
Details
|
|
Annexed 420 miles to the south and merged with Fort Chilkoot
|
| Juneau
|
1970
|
Details
|
|
|
| Kenai Peninsula
|
1964 Jan 1
|
Details
|
|
|
| Ketchikan Gateway
|
1963
|
Details
|
|
|
| Kodiak Island
|
1963
|
Details
|
|
|
| Kobuk Census Area
|
|
|
absorbed into the Northwest Arctic Borough 2 June 1986
|
| Lake and Peninsula
|
1989 Apr 24
|
Details
|
Dillingham Census Area
|
|
| Matanuska-Susitna
|
1964 Jan 1
|
Details
|
|
|
| Nome Census Area
|
|
|
|
| North Slope
|
1972
|
Details
|
|
|
| Northwest Arctic
|
1972
|
Details
|
Kobuk Census Area and North Slope Borough
|
|
| Prince of Wales-Outer Ketchikan Census Area
|
|
|
|
| Sitka
|
1971
|
Details
|
|
|
| Skagway-Hoonah-Angoon Census Area
|
|
remainder of former Skagway-Yakutat-Angoon C.A.
|
|
| Southeast Fairbanks Census Area
|
|
|
|
| Valdez-Cordova Census Area
|
|
|
|
| Wade Hampton Census Area
|
|
|
|
| Wrangell-Petersburg Census Area
|
|
|
|
| Yakutat
|
1992 Sep 22
|
Details
|
Skagway-Yakutat-Angoon Census Area
|
|
| Yukon-Koyukuk Census Area
|
|
|
|
