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County · code 17089

Kane CountyIllinois

Kane County is a county in Illinois with its seat in Geneva, formed in 1836.

  • Founded1836
  • County seatGeneva
  • Named forElias Kane
  • Land area519 sq mi + 4.8 sq mi water
  • Population516,522 2020 Census
  • Parcels mapped187,438 checked 16 October 2026
Open the free map Click any parcel in Kane County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

DeKalbDuPageMcHenryCook Geneva Census outline · seat marked

Where it is

Kane 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 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 CountyKane County Kane
Counties of Illinois · Kane highlighted

History

Formed in 1836 from La Salle County

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

Kane County was created on January 16, 1836, from La Salle County. The county was named after Elias Kane. Kane County lost territory to the creation of De Kalb County in 1837 and Kendall County in 1841.

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

  1. 1836
    Kane County created Kane created from Non-County Area 8 attached to La Salle.
    from La Salle
    · Ill. Laws 1835-1836, pp. 273-278
  2. 1837
    Lost territory Kane lost to creation of De Kalb.
    to De Kalb
    · Ill. Laws 1836-1837, pp. 96-100
  3. 1841
    Lost territory Kane lost to creation of Kendall.
    to Kendall
    · Ill. Laws 1840-1841, pp. 75-77

Land and parcels

What the maps cover in Kane

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

Kane by the Census

Population
516,522 2020 Census count
Housing units
188,510 2020 Census count
Land area
519 square miles
Water area
4.8 square miles
People per sq mi
995 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 Kane 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 Kane County

When was Kane County founded?
Kane County was founded in 1836, formed from La Salle County, and named after Elias Kane.
What is the county seat of Kane County?
The county seat of Kane County is Geneva.
Is there an online parcel map for Kane County?
Yes. Kane County publishes a parcel map of 187,438 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Kane County's boundary or name changed?
Kane County was created in 1836 from La Salle County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving De Kalb County and Kendall County.
Who issues building permits in Kane County?
The county's page on building permits: Permits. Inside a city or town, ask that city first.
Is my lot in a flood zone?
We do not have flood maps for Kane 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