ZIP Codes of Kusilvak Borough, AK

Population & People
Population & People
Total Population
8,112
Household Income
Household Income
Median Income
$50,528
Housing
Housing
Total Housing Units
2,206
Business & Economy
Business & Economy
Total Businesses
70
Employment
Employment
Employment Rate
45.83%
Education
Education
Bachelor's Degree+
5.32%
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 (0 Standard, 12 PO Box, 0 Unique) [See All]
Area Code:907
Timezone:Alaska (GMT -09:00)
Local Time:2:11:17 PM
Population:8,112 [See All]
FIPS:02158
Land Area:2,075 sq mi
Water Area:110 sq mi
Coordinates:62.1361, -164.0186
Quick Link:
https://www.zip-codes.com/county/ak-kusilvak.asp
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Among America's 25 youngest counties
Median age 23.5 — #13 youngest nationwide.

Standout ZIPs in this Borough


Most Populous
Saint Marys · 979 people
12.1% of county total
Highest Income
Mountain Village · $65,078 median
1.3× county average
Largest Land Area
Russian Mission · 905.2 sq mi
Spans the most ground
Fastest Growth
Hooper Bay · -28.3% (10-yr)
1,259 → 903 residents
Most Educated
— no education data

Things worth knowing about Kusilvak Borough


8,112 residents live across 12 ZIPs covering 2,075 sq mi, served by 12 distinct USPS-recognized cities.

Population moved from 7,778 to 8,112 from 2014 to 2024 — a +4.3% change. 8 ZIPs gained residents, 4 lost.

The borough's wealthiest ZIP 99632 (Mountain Village, $65,078 median) and poorest ZIP 99563 (Chevak, $35,875) are 74.1 miles apart — a 1.8× income gap across local geography.

Median home values vary 6.0× across this borough — from $24,800 in 99585 (Marshall) to $150,000 in 99604 (Hooper Bay).

Density varies 728× across the borough — from 0 people/sq mi in 99657 (Russian Mission) to 356 in 99563 (Chevak).

Educational attainment ranges from 0.5% bachelor's+ in 99632 (Mountain Village) to 17.5% in 99581 (Emmonak) — the breadth of educational profiles across the area.

Within Alaska, this is the #12 most populous of 30 boroughs and ranks #29 for median household income .

Weighted by population, the typical household earns about $51,379 across the borough — reflecting what a typical resident sees, not a simple ZIP average.

5.3% of adults age 25+ hold a bachelor's degree or higher (207 of 3,892 reporting).

0 Standard delivery, 12 PO Box only, 0 single-entity Unique ZIPs serve this borough.

Stories about Kusilvak 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
2,075
square miles
Avg density
3.9
people per sq mi
Population
8,112
across 12 ZIPs
Russian Mission
905.2 sq mi
442 residents
Nunam Iqua
838.2 sq mi
no residents
Alakanuk
84.2 sq mi
864 residents

All ZIP Codes in Kusilvak Borough


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
99658Saint MarysPO Box979$47,18848.742.5%
99620KotlikPO Box976$58,04325.453.5%
99581EmmonakPO Box966$57,7648.417.9%
99632Mountain VillagePO Box949$65,07866.521.5%
99604Hooper BayPO Box903$49,6887.6-28.3%
99554AlakanukPO Box864$41,60784.217.9%
99650Pilot StationPO Box713$45,00017.125.7%
99563ChevakPO Box494$35,8751.4-49.9%
99657Russian MissionPO Box442$61,875905.29.4%
99662Scammon BayPO Box440$41,6077.0-3.1%
99585MarshallPO Box386$52,08365.820.6%
99666Nunam IquaPO Box0838.2-100.0%

Adjacent & Nearby Counties