County Maps US

Lyon County, Minnesota

A county in Minnesota, ranked 41 of 87 by population.

CountyFIPS 27083

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

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Population
25,684
+255 (+1.0%) since 2020
Land area
714.4
square miles. A further 1.0% of the total area is water
Population density
36.0
people per square mile, computed rather than published
County seat
Marshall
Seat of county government.
Established
1869
156 years ago
Largest city
Marshall city
Population 14,171.

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 Lyon 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 Lyon 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 672 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 Lyon 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
Population25,68441st of 871,601st of 3,144
Land area714.4 sq mi37th of 871,275th of 3,144
Population density36.0 per sq mi36th of 871,770th of 3,144
Median household income$75,30339th of 87823rd of 3,143

Full data for Lyon County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population25,684Vintage 2025 Population Estimates
Population in 202025,429Vintage 2025 Population Estimates
2020 estimates base?25,523Vintage 2025 Population Estimates
Land area714.4 sq mi2025 Gazetteer Files
Water area7.3 sq mi2025 Gazetteer Files
Total area721.7 sq mi2025 Gazetteer Files
Population density?36.0 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$75,303American Community Survey 2020-2024 5-Year Estimates
Median home value$200,700American Community Survey 2020-2024 5-Year Estimates
Median age37.4American Community Survey 2020-2024 5-Year Estimates
Households10,108American Community Survey 2020-2024 5-Year Estimates
Housing units11,269American 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
+46
317 births, 271 deaths
Net migration
-146
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 Lyon 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
Yellow Medicine CountyMinnesota31 mi9,477
Lincoln CountyMinnesota31 mi5,583
Redwood CountyMinnesota24 mi15,265
Murray CountyMinnesota23 mi7,942
Pipestone CountyMinnesota0.7 mi9,260

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.