Parcel Chartplaces Open the free map

County · code 17017

Cass CountyIllinois

Cass County is a county in Illinois, with its seat in Virginia, formed in 1837.

  • Founded1837
  • County seatVirginia
  • Named forLewis Cass
  • Land area376 sq mi + 7.9 sq mi water
  • Population13,042 2020 Census
Open the free map Click any parcel in Cass County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

MorganSchuylerMasonMenardBrownSangamon Virginia Census outline · seat marked

Where it is

Cass 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 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 CountyCass County Cass
Counties of Illinois · Cass highlighted

History

Formed in 1837 from Morgan County

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

Cass County was created from Morgan County in 1837 and named after Lewis Cass. In 1845, Cass gained a southern border area from Morgan County following a local referendum.

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

  1. 1837
    Cass County created Cass created from Morgan.
    from Morgan
    · Ill. Laws 1836-1837, pp. 101-103; Ill. Laws 1837, spec. sess., pp. 48-50
  2. 1843
    Changed Legislature authorized Cass to gain from Morgan the southern half of township 17 north all along its southern border, dependent on local referendum that failed.
    Morgan
    · Ill. Laws 1842-1843, pp. 104-108
  3. 1845
    Gained territory Cass gained from Morgan.
    from Morgan
    · Ill. Laws 1844-1845, pp. 313-315

Land and parcels

What the maps cover in Cass

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

Cass by the Census

Population
13,042 2020 Census count
Housing units
5,676 2020 Census count
Land area
376 square miles
Water area
7.9 square miles
People per sq mi
35 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 Cass 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 Cass County

When was Cass County founded?
Cass County was founded in 1837, formed from Morgan County, and named after Lewis Cass.
What is the county seat of Cass County?
The county seat of Cass County is Virginia.
Is there an online parcel map for Cass County?
Not that we have found yet. Lot lines and owners of record are kept by the county assessor's office. When a public parcel map appears, it shows here.
Has Cass County's boundary or name changed?
Cass County was created in 1837 from Morgan County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Morgan County.
Is my lot in a flood zone?
We do not have flood maps for Cass 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