Parcel Chartplaces Open the free map

County · code 17071

Henderson CountyIllinois

Henderson County is a county in Illinois with its seat in Oquawka. It was formed on January 20, 1841, from Warren County and named after Richard Henderson.

  • Founded1841
  • County seatOquawka
  • Named forRichard Henderson
  • Land area379 sq mi + 16 sq mi water
  • Population6,387 2020 Census
  • Parcels mapped8,105 checked 15 October 2026
Open the free map Click any parcel in Henderson County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

Des Moines, IAWarrenMercerMcDonoughHancockLee, IA Oquawka Census outline · seat marked

Where it is

Henderson 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 CountyDouglas CountyDuPage CountyEdgar CountyEdwards CountyEffingham CountyFayette CountyFord CountyFranklin CountyFulton CountyGallatin CountyGreene CountyGrundy CountyHamilton CountyHancock CountyHardin 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 CountyHenderson County Henderson
Counties of Illinois · Henderson highlighted

History

Formed in 1841 from Warren County

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

Henderson County was created from Warren County on January 20, 1841.

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

  1. 1841
    Henderson County created Henderson created from Warren.
    from Warren
    · Ill. Laws 1840-1841, pp. 67-69

Land and parcels

What the maps cover in Henderson

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

Henderson by the Census

Population
6,387 2020 Census count
Housing units
3,357 2020 Census count
Land area
379 square miles
Water area
16 square miles
People per sq mi
17 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

Henderson County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

Open Henderson 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.

Open the free map no sign-in Pro early access

Questions

Common questions about Henderson County

When was Henderson County founded?
Henderson County was founded in 1841, formed from Warren County, and named after Richard Henderson.
What is the county seat of Henderson County?
The county seat of Henderson County is Oquawka.
Is there an online parcel map for Henderson County?
Yes. Henderson County publishes a parcel map of 8,105 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Henderson County's boundary or name changed?
Henderson County was created in 1841 from Warren 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 Henderson 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