County Maps US

Douglas County, Illinois

A county in Illinois, ranked 58 of 102 by population.

CountyFIPS 17041

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

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Population
19,880
+106 (+0.5%) since 2020
Land area
416.7
square miles. A further 0.1% of the total area is water
Population density
47.7
people per square mile, computed rather than published
County seat
Tuscola
Seat of county government.
Established
1859
166 years ago
Largest city
Tuscola city
Population 4,668.

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 Douglas 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 Douglas 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 482 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 Douglas 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
Population19,88058th of 1021,831st of 3,144
Land area416.7 sq mi70th of 1022,424th of 3,144
Population density47.7 per sq mi47th of 1021,521st of 3,144
Median household income$77,32022nd of 102711th of 3,143

Full data for Douglas County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population19,880Vintage 2025 Population Estimates
Population in 202019,774Vintage 2025 Population Estimates
2020 estimates base?19,746Vintage 2025 Population Estimates
Land area416.7 sq mi2025 Gazetteer Files
Water area0.56 sq mi2025 Gazetteer Files
Total area417.2 sq mi2025 Gazetteer Files
Population density?47.7 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$77,320American Community Survey 2020-2024 5-Year Estimates
Median home value$150,400American Community Survey 2020-2024 5-Year Estimates
Median age38.7American Community Survey 2020-2024 5-Year Estimates
Households7,765American Community Survey 2020-2024 5-Year Estimates
Housing units8,507American 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
+48
281 births, 233 deaths
Net migration
-16
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 6 areas bordering Douglas 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
Coles CountyIllinois29 mi46,607
Champaign CountyIllinois28 mi209,972
Edgar CountyIllinois15 mi16,323
Moultrie CountyIllinois9.7 mi14,371
Piatt CountyIllinois6.6 mi16,791
Vermilion CountyIllinoisa single point71,259

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.