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County · code 17127

Massac CountyIllinois

Massac County is a county in Illinois with its seat in Metropolis, formed in 1843.

  • Founded1843
  • County seatMetropolis
  • Named forFort Massac
  • Land area237 sq mi + 4.9 sq mi water
  • Population14,169 2020 Census
  • Parcels mapped10,827 checked 15 October 2026
Open the free map Click any parcel in Massac County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

McCracken, KYPopeJohnsonLivingston, KYPulaski Metropolis Census outline · seat marked

Where it is

Massac 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 CountyMacoupin CountyMadison CountyMarion CountyMarshall CountyMason 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 CountyMassac County Massac
Counties of Illinois · Massac highlighted

History

Formed in 1843 from Johnson County and Pope County

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

Massac County was created from Johnson and Pope Counties on February 8, 1843, and named after Fort Massac. The county lost territory to Pope County on March 3, 1843, and to the newly created Pulaski County on June 5, 1843.

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

  1. 1843
    Massac County created Massac created from Johnson and Pope.
    from Johnsonfrom Pope
    · Ill. Laws 1842-1843, pp. 74-76
  2. 1843
    Lost territory Massac lost to Pope.
    to Pope
    · Ill. Laws 1842-1843, p. 101
  3. 1843
    Lost territory Massac lost to creation of Pulaski.
    to Pulaski
    · Ill. Laws 1842-1843, pp. 99-101

Land and parcels

What the maps cover in Massac

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

Massac by the Census

Population
14,169 2020 Census count
Housing units
6,797 2020 Census count
Land area
237 square miles
Water area
4.9 square miles
People per sq mi
60 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

Massac 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 Massac 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 Massac County

When was Massac County founded?
Massac County was founded in 1843, formed from Johnson County and Pope County, and named after Fort Massac.
What is the county seat of Massac County?
The county seat of Massac County is Metropolis.
Is there an online parcel map for Massac County?
Yes. A public source publishes a parcel map of 10,827 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Massac County's boundary or name changed?
Massac County was created in 1843 from Johnson County and Pope County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Pope County and Pulaski County.
Is my lot in a flood zone?
We do not have flood maps for Massac 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