McLean County, Illinois

County seat: Bloomington · Population 171,419 (2025) · 1,183 sq mi

McLean County is the 13th most populous of Illinois's 102 counties, with 171,419 people (2025 estimate). Its county seat is Bloomington. It is part of the North Central region, one of the 10 Illinois economic development regions (DCEO). The map shows its 22 cities and towns and the 8 neighboring counties.

Map of McLean County, Illinois with cities, towns and the county boundary
McLean 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) 126 KBPNG image 81 KBIllinois county map

McLean County facts

County seat
Bloomington
Population (2025 estimate)
171,419 +0.1% since 2020
Land area
1,183 sq mi 1st largest of 102
Water area
3 sq mi
Population density
145 per sq mi
Established
1830
Same name
One of 3 McLean Counties in the US
Named after
John McLean Illinois politician (1791-1830)
Largest city
Bloomington 78,804
Median household income
$79,905
Cities and towns
22 plus 2 CDPs
ZIP codes
33
Time zone
Central
FIPS code
17113

Cities and towns in McLean County

McLean County has 22 incorporated cities, towns and villages. Populations count the people living inside McLean County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
Bloomington (county seat)City78,804
NormalTown53,275
Le RoyCity3,465
HeyworthVillage2,869
LexingtonCity2,079
HudsonVillage1,750
ChenoaCity1,705
GridleyVillage1,428
DownsVillage1,173
DanversVillage1,062
ColfaxVillage973
McLeanVillage733
SaybrookVillage641
CarlockVillage593
StanfordVillage586
TowandaVillage423
BellflowerVillage331
ArrowsmithVillage269
EllsworthVillage179
AnchorVillage155
CooksvilleVillage153
El PasoCity0Woodford County

Unincorporated communities (CDPs)

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

CommunityPopulationAlso in
Twin Grove1,458
Shirley103

ZIP codes in McLean County

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

Population of McLean County, 2020–2025

McLean County grew by 193 people (+0.1%) between April 2020 and July 2025: 1,415 more births than deaths and a net loss of 1,337 people from migration.

Year (July 1)Population
2020171,210
2021171,313
2022171,054
2023170,931
2024171,512
2025171,419

Neighboring counties

Printable McLean 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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