County Maps US

Kankakee County, Illinois

A county in Illinois, ranked 18 of 102 by population.

CountyFIPS 17091

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

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Population
105,525
-1,877 (-1.7%) since 2020
Land area
676.5
square miles. A further 0.7% of the total area is water
Population density
156
people per square mile, computed rather than published
County seat
Kankakee
Seat of county government.
Established
1853
172 years ago
Largest city
Kankakee city
Population 23,400.

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 Kankakee 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 Kankakee County, Illinois 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 483 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 Kankakee County ranks

Position among the 102 counties of Illinois, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn IllinoisNationally
Population105,52518th of 102596th of 3,144
Land area676.5 sq mi27th of 1021,387th of 3,144
Population density156 per sq mi20th of 102678th of 3,144
Median household income$71,28140th of 1021,108th of 3,143

Full data for Kankakee County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population105,525Vintage 2025 Population Estimates
Population in 2020107,402Vintage 2025 Population Estimates
2020 estimates base?107,648Vintage 2025 Population Estimates
Land area676.5 sq mi2025 Gazetteer Files
Water area4.8 sq mi2025 Gazetteer Files
Total area681.3 sq mi2025 Gazetteer Files
Population density?156 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$71,281American Community Survey 2020-2024 5-Year Estimates
Median home value$192,600American Community Survey 2020-2024 5-Year Estimates
Median age39.0American Community Survey 2020-2024 5-Year Estimates
Households40,996American Community Survey 2020-2024 5-Year Estimates
Housing units45,415American 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
-153
1,067 births, 1,220 deaths
Net migration
-142
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 7 areas bordering Kankakee 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
Will CountyIllinois43 mi712,253
Iroquois CountyIllinois32 mi26,150
Newton CountyIndiana11 mi14,188
Lake CountyIndiana9.1 mi504,612
Livingston CountyIllinois8.3 mi35,057
Grundy CountyIllinois6.6 mi54,052
Ford CountyIllinois6.0 mi13,216

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 102 counties of Illinois

Open the interactive Illinois county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.