What is the largest city in McLean County, IL?

Bloomington is the largest city or town in McLean County, with about 78,907 residents.

How many ZIP codes are in McLean County?

McLean County includes 25 ZIP Code Tabulation Areas, including 61701, 61704, 61705, 61720, 61722.

What is the population of McLean County, IL?

About 171,556 people live in McLean County, based on American Community Survey 5-year estimates.

What counties border McLean County?

McLean County borders Champaign County, Tazewell County, Woodford County, Livingston County, Logan County, Piatt County, De Witt County, Ford County.

McLean County, IL: Cities, ZIP Codes & Local Data

Population

171,556

Land area

1,183sq mi

People per sq mi

145

ZIP codes

25

McLean County at a glance

McLean County is 37% less dense than Illinois as a whole.
It is the 13th most populous of 102 counties in Illinois.
Households here earn a median of $79,905 a year, 4% less than the Illinois figure of $83,390.
A typical owner-occupied home is valued at $208,400 (21% below Illinois) and median rent is $1,009 a month.
The biggest population centers are Bloomington (78,907), Normal (53,569) and Le Roy (3,236).

Local data for McLean County, IL

Counts from official public data

Housing and community stats

McLean County, IL, American Community Survey 2020-2024

Full profile

Median household income

$79,905

Poverty rate

12.9%

Median home value

$208,400

Prices +5.0% in a year

Median rent

$1,009/mo

Homeownership

65.1%

Bachelor's or higher

47.2%

Median age

34.3

Average commute

18.3 min

Largest reported origins and ancestries: German Americans (43,844), Irish Americans (24,673), Mexican Americans (8,298).

Home values and rents Income, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

3.4%

Aug 2026, -0.9 pts in a year

Average annual pay

$68,708

87,006 jobs, 2025

Income per person

$66,091

BEA, 2024

Federal spending

$958M

FY 2026, $5,603 per person

PPP loans

$359M

5,940 loans, 43,216 jobs reported

Campaign donations

$895K

Itemized, 2026 cycle

Economy Federal spending PPP loans

How people get to work

McLean County, IL, workers 16 and older. American Community Survey 5-year estimates

Drove alone69.1%
Carpooled7.8%
Public transit0.7%
Walked4.0%
Bicycle0.3%
Taxi, ride-hailing, motorcycle or other0.6%
Worked from home17.5%

Average one-way commute: 18.3 minutes for people who do not work from home.

Environment and hazard risk

McLean County, IL, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Moderate

Top: cold wave

Storm events since 1996

782

Most often thunderstorm wind

Flood insurance policies

112

0.2% of homes, county

July high / Jan low

86° / 16°F

39.4 inches of rain a year

Hazards, floods and storm history Check a flood zone 26 historic places

Health statistics

Share of adults in McLean County, IL, CDC PLACES estimates

All 40 measures

Obesity

34.5%

U.S. 33.3% +1.2 pts

Diabetes

9.5%

U.S. 12.1% -2.6 pts

Smoking

11.2%

U.S. 12.8% -1.6 pts

Uninsured (18-64)

6.8%

U.S. 11.1% -4.3 pts

Cities, towns and ZIP codes in McLean County

Population shown

Frequently asked questions

What is the largest city in McLean County, IL?: Bloomington is the largest city or town in McLean County, with about 78,907 residents.
How many ZIP codes are in McLean County?: McLean County includes 25 ZIP Code Tabulation Areas, including 61701, 61704, 61705, 61720, 61722.
What is the population of McLean County, IL?: About 171,556 people live in McLean County, based on American Community Survey 5-year estimates.
What counties border McLean County?: McLean County borders Champaign County, Tazewell County, Woodford County, Livingston County, Logan County, Piatt County, De Witt County, Ford County.