County Maps US

Pennington County, Minnesota

A county in Minnesota, ranked 60 of 87 by population.

CountyFIPS 27113

Within Minnesota
Pennington County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Thief River Falls, the county seat, located via the 2025 Census Gazetteer.

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Population
13,686
-256 (-1.8%) since 2020
Land area
616.5
square miles. A further 0.3% of the total area is water
Population density
22.2
people per square mile, computed rather than published
County seat
Thief River Falls
Seat of county government.
Established
1910
115 years ago
Largest city
Thief River Falls city
Population 8,799.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Pennington County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Pennington County, Minnesota from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 366 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Pennington County ranks

Position among the 87 counties of Minnesota, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MinnesotaNationally
Population13,68660th of 872,180th of 3,144
Land area616.5 sq mi50th of 871,570th of 3,144
Population density22.2 per sq mi51st of 872,158th of 3,144
Median household income$77,32528th of 87710th of 3,143

Full data for Pennington County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population13,686Vintage 2025 Population Estimates
Population in 202013,942Vintage 2025 Population Estimates
2020 estimates base?13,987Vintage 2025 Population Estimates
Land area616.5 sq mi2025 Gazetteer Files
Water area1.7 sq mi2025 Gazetteer Files
Total area618.2 sq mi2025 Gazetteer Files
Population density?22.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$77,325American Community Survey 2020-2024 5-Year Estimates
Median home value$195,500American Community Survey 2020-2024 5-Year Estimates
Median age39.6American Community Survey 2020-2024 5-Year Estimates
Households6,207American Community Survey 2020-2024 5-Year Estimates
Housing units6,799American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
+17
154 births, 137 deaths
Net migration
-80
More people moved out than moved in.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 5 areas bordering Pennington County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Marshall CountyMinnesota42 mi8,798
Red Lake CountyMinnesota38 mi3,940
Polk CountyMinnesota21 mi30,545
Beltrami CountyMinnesota11 mi47,055
Clearwater CountyMinnesota6.0 mi8,647

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 87 counties of Minnesota

Open the interactive Minnesota county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.