Map of Matanuska-Susitna Borough, Alaska

Matanuska-Susitna Borough (often referred to as the Mat-Su Borough) is a borough located in the U.S. state of Alaska. Its borough seat is Palmer, and the largest community is the census-designated place of Knik-Fairview. As of the 2020 census, the borough’s population was 107,801,

The borough is part of the Anchorage Metropolitan Statistical Area, along with the municipality of Anchorage on its south.

The Mat-Su Borough is so designated because it contains the entire Matanuska and Susitna Rivers. They empty into Cook Inlet, which is the southern border of the Mat-Su Borough. It is one of the few agricultural areas of Alaska.

Matanuska-Susitna Borough overview:
Name:	Matanuska-Susitna Borough
FIPS code:	02-170
State:	Alaska
Named for:	Matanuska River and Susitna River
Seat:	Palmer
Total Area:	25,258 sq mi (65,420 km²)
Land Area:	24,608 sq mi (63,730 km²)
Total Population:	107,801
Population Density:	4.3/sq mi (1.6/km²)

Matanuska-Susitna Borough location map. Where is Matanuska-Susitna Borough?

Matanuska-Susitna Borough location on the Alaska map. Where is Matanuska-Susitna Borough. — Location of Matanuska-Susitna Borough in Alaska.

Matanuska-Susitna Borough Road Map

Matanuska-Susitna BoroughStreet Map. — Street map of Matanuska-Susitna Borough, Alaska. Source: OpenStreetMap (OSM)

Geography

The borough seat is Palmer, and the largest community is the census-designated place of Knik-Fairview, Alaska.

As of the 2020 census, the population was 107,081, up from 88,995 in 2010. It is the fastest growing subdivision in Alaska.

According to the United States Census Bureau, the borough has a total area of 25,258 square miles (65,420 km), of which 24,608 square miles (63,730 km) is land and 650 square miles (1,700 km) (2.6%) is water.