Matanuska-Susitna

Matanuska-Susitna Borough is a borough located in the U.S. state of Alaska. Its county seat is Palmer, and the largest community is the census-designated place of Knik-Fairview.

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. These rivers empty into Cook Inlet, which is the southern border of the Mat-Su Borough. This area is one of the few agricultural areas of Alaska.