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County · code 17009

Brown CountyIllinois

Brown County is a county in Illinois with its county seat in Mount Sterling, formed in 1839.

  • Founded1839
  • County seatMount Sterling
  • Named forJacob Brown
  • Land area306 sq mi + 1.6 sq mi water
  • Population6,244 2020 Census
  • Parcels mapped5,616 checked 15 October 2026
Open the free map Click any parcel in Brown County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

SchuylerPikeAdamsCassMorgan Mount Sterling Census outline · seat marked

Where it is

Brown 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 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 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 CountyBrown County Brown
Counties of Illinois · Brown highlighted

History

Formed in 1839 from Schuyler County

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

Brown County was created from Schuyler County on February 1, 1839. The county was named after Jacob Brown.

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

  1. 1839
    Brown County created Brown created from Schuyler.
    from Schuyler
    · Ill. Laws 1838-1839, pp. 52-55

Land and parcels

What the maps cover in Brown

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

Brown by the Census

Population
6,244 2020 Census count
Housing units
2,330 2020 Census count
Land area
306 square miles
Water area
1.6 square miles
People per sq mi
20 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

Brown 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 Brown 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 Brown County

When was Brown County founded?
Brown County was founded in 1839, formed from Schuyler County, and named after Jacob Brown.
What is the county seat of Brown County?
The county seat of Brown County is Mount Sterling.
Is there an online parcel map for Brown County?
Yes. A public source publishes a parcel map of 5,616 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Brown County's boundary or name changed?
Brown County was created in 1839 from Schuyler 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 Brown 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