County Maps US

St. Louis County, Minnesota

The largest of Minnesota's 87 counties by land area.

CountyFIPS 27137

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

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Population
200,518
+451 (+0.2%) since 2020
Land area
6,248
square miles. A further 8.9% of the total area is water
Population density
32.1
people per square mile, computed rather than published
County seat
Duluth
Seat of county government.
Established
1856
169 years ago
Largest city
Duluth city
Population 88,330.

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 St. Louis 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 St. Louis 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 403 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 St. Louis 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
Population200,5186th of 87358th of 3,144
Land area6,248 sq mi1st of 8755th of 3,144
Population density32.1 per sq mi38th of 871,865th of 3,144
Median household income$70,06968th of 871,195th of 3,143

Full data for St. Louis County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population200,518Vintage 2025 Population Estimates
Population in 2020200,067Vintage 2025 Population Estimates
2020 estimates base?200,227Vintage 2025 Population Estimates
Land area6,248 sq mi2025 Gazetteer Files
Water area612.4 sq mi2025 Gazetteer Files
Total area6,861 sq mi2025 Gazetteer Files
Population density?32.1 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$70,069American Community Survey 2020-2024 5-Year Estimates
Median home value$221,400American Community Survey 2020-2024 5-Year Estimates
Median age41.2American Community Survey 2020-2024 5-Year Estimates
Households87,115American Community Survey 2020-2024 5-Year Estimates
Housing units104,263American 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
-620
1,693 births, 2,313 deaths
Net migration
+501
More people moved in than moved out.

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

The 6 areas bordering St. Louis 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
Lake CountyMinnesota97 mi10,746
Itasca CountyMinnesota61 mi45,404
Koochiching CountyMinnesota52 mi11,587
Carlton CountyMinnesota43 mi36,711
Douglas CountyWisconsin36 mi43,990
Aitkin CountyMinnesota18 mi16,252

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.