BOROUGH · AK

Matanuska-Susitna Borough, Alaska

Matanuska-Susitna Borough is a borough in Alaska with FIPS code 02170 and an estimated population of 115,239 (Census 2023), 2nd largest of 30 in the state.

County facts

Name: Matanuska-Susitna Borough
State: Alaska
Type: borough
FIPS code: 02170
State FIPS: 02
Population (2023): 115,239
Change since 2020: +7.2%
State rank: 2 of 30

Population is the Census Bureau’s Vintage 2023 estimate.

Other counties in Alaska

Anchorage Municipality Fairbanks North Star Borough Kenai Peninsula Borough Juneau City and Borough Bethel Census Area Ketchikan Gateway Borough Kodiak Island Borough North Slope Borough All 30

Questions

What is the FIPS code for Matanuska-Susitna Borough?

Matanuska-Susitna Borough, Alaska has the five-digit FIPS code 02170: 02 for the state and 170 for the county.

What state is Matanuska-Susitna Borough in?

Matanuska-Susitna Borough is in Alaska.

How do I know if an address is in this county?

Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.

Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.