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County · code 17117

Macoupin CountyIllinois

Macoupin County is a county in Illinois with its seat in Carlinville, formed on January 17, 1829.

  • Founded1829
  • County seatCarlinville
  • Named forMacoupin Creek
  • Land area863 sq mi + 4.7 sq mi water
  • Population44,967 2020 Census
  • Parcels mapped38,000 checked 15 October 2026
Open the free map Click any parcel in Macoupin County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

MadisonMontgomeryJerseyGreeneMorganSangamon Carlinville Census outline · seat marked

Where it is

Macoupin 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 CountyHenderson CountyHenry CountyIroquois CountyJackson CountyJasper CountyJefferson CountyJersey CountyJo Daviess CountyJohnson CountyKane CountyKankakee CountyKendall CountyKnox CountyLake CountyLaSalle CountyLawrence CountyLee CountyLivingston CountyLogan CountyMcDonough CountyMcHenry CountyMcLean CountyMacon 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 CountyMacoupin County Macoupin
Counties of Illinois · Macoupin highlighted

History

Formed in 1829 from Madison County and Greene County

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

Macoupin County was created from Madison County and all of Non-County Area 2 attached to Greene County. The county was named after Macoupin Creek.

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

  1. 1829
    Macoupin County created Macoupin created from Madison and all of Non-County Area 2 attached to Greene.
    from Madisonfrom Greene
    · Ill. Rev. Code 1828-1829, pp. 26-28
  2. 1841
    Changed Legislature authorized creation of Allen (proposed) from Macoupin, Morgan, and Sangamon, dependent on local referendum that failed (no change).
    AllenMorganSangamon
    · Ill. Laws 1840-1841, pp. 87-90
  3. 1843
    Changed Legislature authorized creation of Benton (proposed) from Macoupin, Greene, and Morgan, dependent on local referendum that failed (no change).
    BentonGreeneMorgan
    · Ill. Laws 1842-1843, pp. 104-108
  4. 1851
    Changed Legislature authorized creation of Oregon (proposed) from Macoupin, Morgan, and Sangamon, dependent on local referendum that failed (no change).
    OregonMorganSangamon
    · Ill. Laws 1851, gen., pp. 131-134

Land and parcels

What the maps cover in Macoupin

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

Macoupin by the Census

Population
44,967 2020 Census count
Housing units
21,023 2020 Census count
Land area
863 square miles
Water area
4.7 square miles
People per sq mi
52 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.

Permits

Zoning and code

County government

See your own lot on these maps

Open Macoupin 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 Macoupin County

When was Macoupin County founded?
Macoupin County was founded in 1829, formed from Madison County and Greene County, and named after Macoupin Creek.
What is the county seat of Macoupin County?
The county seat of Macoupin County is Carlinville.
Is there an online parcel map for Macoupin County?
Yes. A public source publishes a parcel map of 38,000 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Macoupin County's boundary or name changed?
Macoupin County was created in 1829 from Madison County and Greene County. Its boundary has been clarified three times since, with no change on the ground.
Who issues building permits in Macoupin County?
The county's page on building permits: https://www.macoupincode.com/windpermit.html. Inside a city or town, ask that city first.
Is my lot in a flood zone?
We do not have flood maps for Macoupin 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