ZIP Codes of Matanuska Susitna Borough, AK

Population & People
Population & People
Total Population
112,988
Household Income
Household Income
Median Income
$77,167
Housing
Housing
Total Housing Units
50,573
Business & Economy
Business & Economy
Total Businesses
2,811
Employment
Employment
Employment Rate
55.38%
Education
Education
Bachelor's Degree+
24.41%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 12 ZIPs in this borough.
Data Last Updated: June 1, 2026
ZIP Codes:12 ZIP Codes (6 Standard, 6 PO Box, 0 Unique) [See All]
Area Code:907
Timezone:Alaska (GMT -09:00)
Local Time:2:11:17 PM
Population:112,988 [See All]
FIPS:02170
CBSA:Anchorage, AK
Land Area:12,746 sq mi
Water Area:136 sq mi
Coordinates:61.8084, -149.7911
Quick Link:
https://www.zip-codes.com/county/ak-matanuska-susitna.asp
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Among America's 10 largest counties by area
#10 largest, spanning 12,746 sq mi.
Top 3 most populous in Alaska
#2 of 30 counties in Alaska, with 112,988 residents.
Among Alaska's 5 fastest-growing counties
#2 statewide, up 20.6% from 2014 to 2024.
Alaska's longest commutes
35-minute average travel time to work.

Standout ZIPs in this Borough


Most Populous
Wasilla · 44,647 people
39.5% of county total
Highest Income
Palmer · $100,455 median
1.3× county average
Largest Land Area
Skwentna · 5,373.6 sq mi
Spans the most ground
Fastest Growth
Sutton · 42.9% (10-yr)
1,241 → 1,774 residents
Most Educated
Palmer · 32.4% bachelor's+
6,880 of 21,228 adults 25+

Things worth knowing about Matanuska Susitna Borough


112,988 residents live across 12 ZIPs covering 12,746 sq mi, served by 9 distinct USPS-recognized cities.

Population moved from 93,679 to 89,564 from 2014 to 2024 — a -4.4% change. 7 ZIPs gained residents, 2 lost.

The borough's wealthiest ZIP 99645 (Palmer, $100,455 median) and poorest ZIP 99676 (Talkeetna, $54,028) are 66.8 miles apart — a 1.9× income gap across local geography.

Median home values vary 1.7× across this borough — from $217,900 in 99683 (Trapper Creek) to $367,400 in 99645 (Palmer).

Density varies 1743× across the borough — from 0 people/sq mi in 99683 (Trapper Creek) to 378 in 99654 (Wasilla).

Educational attainment ranges from 13.3% bachelor's+ in 99694 (Houston ) to 32.4% in 99645 (Palmer) — the breadth of educational profiles across the area.

Within Alaska, this is the #2 most populous of 30 boroughs and ranks #15 for median household income with the #2 fastest decade growth .

Weighted by population, the typical household earns about $93,669 across the borough — reflecting what a typical resident sees, not a simple ZIP average.

24.4% of adults age 25+ hold a bachelor's degree or higher (18,268 of 74,849 reporting).

6 Standard delivery, 6 PO Box only, 0 single-entity Unique ZIPs serve this borough.

Stories about Matanuska Susitna Borough


Big & sparse

A frontier borough — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
12,746
square miles
Avg density
8.9
people per sq mi
Population
112,988
across 12 ZIPs
Skwentna
5,373.6 sq mi
261 residents
Trapper Creek
2,691.5 sq mi
583 residents
Sutton
1,226.2 sq mi
1,774 residents

All ZIP Codes in Matanuska Susitna Borough


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
99654WasillaStandard44,647$97,544118.2-19.3%
99645PalmerStandard32,103$100,455643.920.8%
99623WasillaStandard23,424$88,799686.1
99652Big LakePO Box4,313$78,5780.01.8%
99688WillowStandard2,739$77,197918.83.6%
99674SuttonStandard1,774$63,6881,226.242.9%
99676TalkeetnaStandard1,628$54,0281,048.817.7%
99694HoustonPO Box1,516$74,5310.0-9.7%
99683Trapper CreekPO Box583$73,0982,691.57.2%
99667SkwentnaPO Box261$63,7505,373.6327.9%
99687WasillaPO Box38.9
99629WasillaPO Box0.0

Adjacent & Nearby Counties