ZIP Codes of Pennington County, MN

Population & People
Population & People
Total Population
14,137
Household Income
Household Income
Median Income
$76,894
Housing
Housing
Total Housing Units
6,934
Business & Economy
Business & Economy
Total Businesses
369
Employment
Employment
Employment Rate
67.31%
Education
Education
Bachelor's Degree+
21.02%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 3 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:218
Timezone:Central (GMT -06:00)
Local Time:2:12:38 PM
Population:14,137 [See All]
FIPS:27113
Land Area:780 sq mi
Water Area:2 sq mi
Coordinates:48.1003, -96.0808
Quick Link:
https://www.zip-codes.com/county/mn-pennington.asp
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Minnesota's shortest commutes
13-minute avg commute — the shortest in the state.

Standout ZIPs in this County


Most Populous
Thief River Falls · 12,705 people
89.9% of county total
Highest Income
Saint Hilaire · $79,167 median
1.0× county average
Largest Land Area
Thief River Falls · 392.3 sq mi
Spans the most ground
Fastest Growth
Thief River Falls · 0.1% (10-yr)
12,691 → 12,705 residents
Most Educated
Thief River Falls · 21.5% bachelor's+
1,911 of 8,899 adults 25+

Things worth knowing about Pennington County


14,137 residents live across 3 ZIPs covering 780 sq mi, served by 3 distinct USPS-recognized cities.

Population moved from 14,253 to 14,137 from 2014 to 2024 — a -0.8% change. 1 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 56754 (Saint Hilaire, $79,167 median) and poorest ZIP 56725 (Goodridge, $72,917) are 21.2 miles apart — a 1.1× income gap across local geography.

Median home values vary 1.1× across this county — from $196,000 in 56701 (Thief River Falls) to $220,200 in 56725 (Goodridge).

Density varies 12× across the county — from 3 people/sq mi in 56725 (Goodridge) to 32 in 56701 (Thief River Falls).

Educational attainment ranges from 16.1% bachelor's+ in 56754 (Saint Hilaire) to 21.5% in 56701 (Thief River Falls) — the breadth of educational profiles across the area.

Within Minnesota, this is the #58 most populous of 93 counties and ranks #43 for median household income .

Weighted by population, the typical household earns about $78,241 across the county — reflecting what a typical resident sees, not a simple ZIP average.

21.0% of adults age 25+ hold a bachelor's degree or higher (2,080 of 9,897 reporting).

3 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Pennington County


Big & sparse

A frontier county — 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
780
square miles
Avg density
18.1
people per sq mi
Population
14,137
across 3 ZIPs
Thief River Falls
392.3 sq mi
12,705 residents
Goodridge
353.9 sq mi
941 residents
Saint Hilaire
34.0 sq mi
491 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Thief River Falls

All ZIP Codes in Pennington County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
56701Thief River FallsStandard12,705$78,599392.30.1%
56725GoodridgeStandard941$72,917353.9-8.8%
56754Saint HilaireStandard491$79,16734.0-7.4%

Adjacent & Nearby Counties