Kane County, Illinois

County seat: Geneva · Population 525,757 (2025) · 519 sq mi

Kane County is the 5th most populous of Illinois's 102 counties, with 525,757 people (2025 estimate). Its county seat is Geneva. It is part of the Northeast region, one of the 10 Illinois economic development regions (DCEO). The map shows its 29 cities and towns and the 5 neighboring counties.

Map of Kane County, Illinois with cities, towns and the county boundary
Kane County, Illinois with its cities and towns, unincorporated communities (CDPs) and neighboring counties. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
Download PDF (Letter) 142 KBPNG image 101 KBIllinois county map

Kane County facts

County seat
Geneva
Population (2025 estimate)
525,757 +1.8% since 2020
Land area
519 sq mi 50th largest of 102
Water area
5 sq mi
Population density
1,012 per sq mi
Established
1836
Named after
Elias Kane American politician (1794–1835)
Largest city
Aurora 110,937 in the county
Median household income
$103,163
Cities and towns
29 plus 1 CDPs
ZIP codes
34
Time zone
Central
FIPS code
17089

Cities and towns in Kane County

Kane County has 29 incorporated cities, towns and villages. Populations count the people living inside Kane County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
AuroraCity110,937DuPage, Kendall and Will counties
ElginCity90,821Cook County
CarpentersvilleVillage37,045
St. CharlesCity32,987DuPage County
BataviaCity26,586DuPage County
South ElginVillage25,656
Geneva (county seat)City21,138
North AuroraVillage19,406
Pingree GroveVillage12,545
Campton HillsVillage10,894
MontgomeryVillage9,559Kendall County
Sugar GroveVillage9,381
HampshireVillage9,266McHenry County
GilbertsVillage9,082
West DundeeVillage8,570
AlgonquinVillage8,499McHenry County
ElburnVillage7,084
HuntleyVillage5,829McHenry County
East DundeeVillage3,130Cook County
Sleepy HollowVillage3,122
Big RockVillage1,090
Lily LakeVillage1,073
WayneVillage774DuPage County
Maple ParkVillage762DeKalb County
BurlingtonVillage517
KanevilleVillage447
VirgilVillage284
Barrington HillsVillage123Cook, Lake and McHenry counties
BartlettVillage94Cook and DuPage counties

Unincorporated communities (CDPs)

Census-designated places are communities without their own city government; the county provides their services.

CommunityPopulationAlso in
Prestbury2,045

ZIP codes in Kane County

34 ZIP codes reach into Kane County. ZIP codes ignore county lines, so some also cover a neighboring county.

Population of Kane County, 2020–2025

Kane County grew by 9,048 people (+1.8%) between April 2020 and July 2025: 8,763 more births than deaths and a net loss of 58 people from migration.

Year (July 1)Population
2020516,364
2021516,626
2022515,285
2023518,295
2024523,430
2025525,757

Neighboring counties

Printable Kane County map

The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.

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Sources

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