County Maps US

Isanti County, Minnesota

A county in Minnesota, ranked 24 of 87 by population.

CountyFIPS 27059

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

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Population
44,386
+3,001 (+7.3%) since 2020
Land area
435.8
square miles. A further 3.5% of the total area is water
Population density
102
people per square mile, computed rather than published
County seat
Cambridge
Seat of county government.
Established
1857
168 years ago
Largest city
Cambridge city
Population 11,090.

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 Isanti 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 Isanti 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 752 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 Isanti 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
Population44,38624th of 871,111th of 3,144
Land area435.8 sq mi75th of 872,324th of 3,144
Population density102 per sq mi14th of 87891st of 3,144
Median household income$87,44013th of 87363rd of 3,143

Full data for Isanti County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population44,386Vintage 2025 Population Estimates
Population in 202041,385Vintage 2025 Population Estimates
2020 estimates base?41,128Vintage 2025 Population Estimates
Land area435.8 sq mi2025 Gazetteer Files
Water area15.9 sq mi2025 Gazetteer Files
Total area451.7 sq mi2025 Gazetteer Files
Population density?102 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$87,440American Community Survey 2020-2024 5-Year Estimates
Median home value$306,200American Community Survey 2020-2024 5-Year Estimates
Median age40.2American Community Survey 2020-2024 5-Year Estimates
Households16,293American Community Survey 2020-2024 5-Year Estimates
Housing units17,268American 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
+54
475 births, 421 deaths
Net migration
+682
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 Isanti 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
Chisago CountyMinnesota28 mi59,142
Anoka CountyMinnesota24 mi381,605
Kanabec CountyMinnesota18 mi16,628
Mille Lacs CountyMinnesota12 mi27,753
Sherburne CountyMinnesota9.9 mi104,194
Pine CountyMinnesotaa single point30,472

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.