County Maps US

Nicollet County, Minnesota

A county in Minnesota, ranked 33 of 87 by population.

CountyFIPS 27103

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

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Population
34,273
-231 (-0.7%) since 2020
Land area
448.5
square miles. A further 3.9% of the total area is water
Population density
76.4
people per square mile, computed rather than published
County seat
St. Peter
Seat of county government.
Established
1853
172 years ago
Largest city
North Mankato city
Population 14,165.

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 Nicollet 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 Nicollet 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 438 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 Nicollet 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
Population34,27333rd of 871,332nd of 3,144
Land area448.5 sq mi73rd of 872,278th of 3,144
Population density76.4 per sq mi19th of 871,116th of 3,144
Median household income$79,75623rd of 87596th of 3,143

Full data for Nicollet County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population34,273Vintage 2025 Population Estimates
Population in 202034,504Vintage 2025 Population Estimates
2020 estimates base?34,458Vintage 2025 Population Estimates
Land area448.5 sq mi2025 Gazetteer Files
Water area18.3 sq mi2025 Gazetteer Files
Total area466.8 sq mi2025 Gazetteer Files
Population density?76.4 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$79,756American Community Survey 2020-2024 5-Year Estimates
Median home value$270,300American Community Survey 2020-2024 5-Year Estimates
Median age38.3American Community Survey 2020-2024 5-Year Estimates
Households13,002American Community Survey 2020-2024 5-Year Estimates
Housing units13,596American 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
+12
300 births, 288 deaths
Net migration
+20
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 5 areas bordering Nicollet 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
Brown CountyMinnesota44 mi25,517
Blue Earth CountyMinnesota42 mi70,634
Sibley CountyMinnesota34 mi15,356
Le Sueur CountyMinnesota25 mi29,453
Renville CountyMinnesota7.7 mi14,356

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.