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County · code 17041

Douglas CountyIllinois

Douglas County is located in Illinois and was created in 1859 from Coles County, with its seat in Tuscola.

  • Founded1859
  • County seatTuscola
  • Named forStephen A. Douglas
  • Land area417 sq mi + 0.6 sq mi water
  • Population19,740 2020 Census
  • Parcels mapped15,498 checked 16 October 2026
Open the free map Click any parcel in Douglas County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

ColesChampaignEdgar Tuscola Census outline · seat marked

Where it is

Douglas on the map of Illinois

Illinois has 102 counties and county equivalents, each with its own records office. Shapes with a page are links.

Adams CountyAlexander CountyBond CountyBoone CountyBrown CountyBureau CountyCalhoun CountyCarroll CountyCass CountyChampaign CountyChristian CountyClark CountyClay CountyClinton CountyColes CountyCook CountyCrawford CountyCumberland CountyDeKalb CountyDe Witt CountyDuPage CountyEdgar CountyEdwards CountyEffingham CountyFayette CountyFord CountyFranklin CountyFulton CountyGallatin CountyGreene CountyGrundy CountyHamilton CountyHancock CountyHardin CountyHenderson CountyHenry CountyIroquois CountyJackson CountyJasper CountyJefferson CountyJersey CountyJo Daviess CountyJohnson CountyKane CountyKankakee CountyKendall CountyKnox CountyLake CountyLaSalle CountyLawrence CountyLee CountyLivingston CountyLogan CountyMcDonough CountyMcHenry CountyMcLean CountyMacon CountyMacoupin CountyMadison CountyMarion CountyMarshall CountyMason CountyMassac CountyMenard CountyMercer CountyMonroe CountyMontgomery CountyMorgan CountyMoultrie CountyOgle CountyPeoria CountyPerry CountyPiatt CountyPike CountyPope CountyPulaski CountyPutnam CountyRandolph CountyRichland CountyRock Island CountySt. Clair CountySaline CountySangamon CountySchuyler CountyScott CountyShelby CountyStark CountyStephenson CountyTazewell CountyUnion CountyVermilion CountyWabash CountyWarren CountyWashington CountyWayne CountyWhite CountyWhiteside CountyWill CountyWilliamson CountyWinnebago CountyWoodford CountyDouglas County Douglas
Counties of Illinois · Douglas highlighted

History

Formed in 1859 from Coles County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Douglas County was established on March 21, 1859, from Coles County, after an earlier attempt to create the county in 1857 with slightly different boundaries had failed. The county was named after Stephen A. Douglas.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1859
    Douglas County created Douglas created from Coles. An earlier attempt on 13 February 1857 to create Douglas, with slightly different boundaries, failed.
    from Coles
    · Ill. Laws 1859, pub., pp. 24-29

Land and parcels

What the maps cover in Douglas

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Douglas by the Census

Population
19,740 2020 Census count
Housing units
8,469 2020 Census count
Land area
417 square miles
Water area
0.6 square miles
People per sq mi
47 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Zoning and code

County government

See your own lot on these maps

Open Douglas County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about Douglas County

When was Douglas County founded?
Douglas County was founded in 1859, formed from Coles County, and named after Stephen A. Douglas.
What is the county seat of Douglas County?
The county seat of Douglas County is Tuscola.
Is there an online parcel map for Douglas County?
Yes. A public source publishes a parcel map of 15,498 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Douglas County's boundary or name changed?
Douglas County was created in 1859 from Coles County. The Atlas of Historical County Boundaries records no boundary change since.
Is my lot in a flood zone?
We do not have flood maps for Douglas County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door