Matanuska-Susitna Borough, Alaska

Matanuska-Susitna Borough (often referred to as the Mat-Su Borough) is a borough in the U.S. state of Alaska. As of the 2020 census, the population was 107,801.[3] The borough seat is Palmer,[4] and largest city is Wasilla.

Matanuska-Susitna Borough
Borough
Ruth Glacier
Location within the U.S. state of Alaska
Alaska's location within the U.S.
Coordinates: 62°24′N 149°35′W
Country	United States
State	Alaska
Incorporated	January 1, 1964[1][2]
Named for	Matanuska River and Susitna River
Seat	Palmer
Largest CDP	Knik-Fairview
Area
• Total	25,258 sq mi (65,420 km2)
• Land	24,608 sq mi (63,730 km2)
• Water	650 sq mi (1,700 km2)  2.6%
Population  (2020)[3]
• Total	107,801
• Density	4.3/sq mi (1.6/km2)
Time zone	UTC−9 (Alaska)
• Summer (DST)	UTC−8 (ADT)
Website	www.matsugov.us