County Maps US

Mahnomen County, Minnesota

A county in Minnesota, ranked 82 of 87 by population.

CountyFIPS 27087

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

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Population
5,153
-220 (-4.1%) since 2020
Land area
557.9
square miles. A further 4.3% of the total area is water
Population density
9.2
people per square mile, computed rather than published
County seat
Mahnomen
Seat of county government.
Established
1906
119 years ago
Largest city
Mahnomen city
Population 1,181.

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 Mahnomen 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 Mahnomen 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 800 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 Mahnomen 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
Population5,15382nd of 872,810th of 3,144
Land area557.9 sq mi59th of 871,858th of 3,144
Population density9.2 per sq mi73rd of 872,590th of 3,144
Median household income$59,44187th of 872,134th of 3,143

Full data for Mahnomen County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population5,153Vintage 2025 Population Estimates
Population in 20205,373Vintage 2025 Population Estimates
2020 estimates base?5,402Vintage 2025 Population Estimates
Land area557.9 sq mi2025 Gazetteer Files
Water area25.0 sq mi2025 Gazetteer Files
Total area582.9 sq mi2025 Gazetteer Files
Population density?9.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$59,441American Community Survey 2020-2024 5-Year Estimates
Median home value$161,900American Community Survey 2020-2024 5-Year Estimates
Median age35.4American Community Survey 2020-2024 5-Year Estimates
Households1,885American Community Survey 2020-2024 5-Year Estimates
Housing units2,547American 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
-4
74 births, 78 deaths
Net migration
-85
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 4 areas bordering Mahnomen 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
Becker CountyMinnesota24 mi35,497
Clearwater CountyMinnesota24 mi8,647
Polk CountyMinnesota24 mi30,545
Norman CountyMinnesota24 mi6,336

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.