• county
  • FIPS 17113
  • Largest town: Bloomington

McLean County, Illinois

McLean County had 172,069 residents in the Census Vintage 2024 estimate, on 1,183.3 square miles of land. It is the largest by land of Illinois's 102 county-equivalents.

Population
172,069
#13 of 102 in Illinois · #406 in US
Area
1,183.3 sq mi
#1 of 102 in Illinois · #517 in US
Density
145 / sq mi
#21 of 102 in Illinois · #711 in US
Median household income
$79,622
#16 of 102 in Illinois · #490 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

McLean County within Illinois. Pin: Springfield.

Measure from here

Tools and pages that start from McLean County

McLean County population, land area and income

McLean County had 172,069 residents in the Census Vintage 2024 estimate, on 1,183.3 square miles of land. It is the largest by land of Illinois's 102 county-equivalents. That works out to 145.4 people per square mile, 1.5 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Illinois has 24,447 residents, so McLean County is 7.0 times that size.

Its SAIPE 2023 median household income of $79,622 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

172,069

3144th1st

406th of 3,144 (US)

Land area

1,183 sq mi

3144th1st

517th of 3,144 (US)

Density

145.4 / sq mi

3144th1st

711th of 3,144 (US)

Median household income

$79,622

3143rd1st

490th of 3,143 (US)

Rank within Illinois (102)

Population

172,069

102nd1st

13th of 102 (IL)

Land area

1,183 sq mi

102nd1st

1st of 102 (IL)

Density

145.4 / sq mi

102nd1st

21st of 102 (IL)

Median household income

$79,622

102nd1st

16th of 102 (IL)

How McLean County's population changed since 2020

McLean County gained 833 residents between the July 2020 and July 2024 estimates, a rise of 0.5%. That ranks 11th of 102 in Illinois for growth. The median Illinois county changed by -1.7%, and the state as a whole by -0.7%.

Since the April 2020 estimates base, McLean County recorded 7,026 births and 6,018 deaths, a natural change of +1,008. Net international migration added +3,617 and net domestic migration, people moving to or from other US counties, came to -3,923. The largest single component was domestic migration, which removed 3,923 people.

171.2k2020171.4k2021171.6k2022171.5k2023172.1k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
7,026
Deaths
6,018
Net international migration
+3,617
Net domestic migration
-3,923
Change, July 2023 to July 2024
+576

Where McLean County is

The Census internal point of McLean County is at 40.494600, -88.844500. It sits in UTM zone 16N. The map shades Illinois's 102 county-equivalents by population change from 2020 to 2024, darker for faster growth, with McLean County outlined. Dots are towns of 1,000+ people with residents in it.

Piatt County: -0.3%Hamilton County: -2.2%Williamson County: -0.1%Edgar County: -2.4%Macoupin County: -2.3%Marshall County: -1.3%Putnam County: +0.0%Richland County: -2.8%Washington County: -1.4%Lee County: -1.5%Douglas County: +0.2%Cook County: -1.6%Effingham County: -0.3%Edwards County: -3.6%Cass County: -2.0%Clay County: -3.4%Knox County: -2.2%LaSalle County: -0.9%Cumberland County: -1.3%Warren County: -3.7%Moultrie County: -0.9%Menard County: -2.5%Fayette County: -1.5%Boone County: -0.0%Lawrence County: -3.2%Marion County: -3.2%Champaign County: +3.0%Clark County: -2.4%Ford County: -0.4%Wayne County: -1.4%Logan County: -1.4%Grundy County: +2.5%Jasper County: -1.8%Crawford County: -1.3%McDonough County: -1.7%Clinton County: +0.5%Perry County: -3.0%Montgomery County: -2.2%Henry County: -2.0%Livingston County: -1.2%Scott County: -3.8%Alexander County: -11.2%Bureau County: -2.2%Brown County: +1.1%Mason County: -3.9%Calhoun County: -4.1%Greene County: -4.3%Coles County: -1.4%Kendall County: +8.2%Lake County: +0.7%Mercer County: -2.2%St. Clair County: -2.3%Wabash County: -3.0%Bond County: -1.7%DuPage County: +0.6%Gallatin County: -5.2%Stephenson County: -3.3%McHenry County: +1.9%White County: -3.0%Saline County: -3.9%Christian County: -2.2%Sangamon County: -1.0%Massac County: -3.6%Macon County: -2.9%Johnson County: -0.0%Jo Daviess County: -2.6%Peoria County: -1.0%DeKalb County: +1.0%Pope County: -1.5%De Witt County: -0.9%Schuyler County: -1.7%Fulton County: -3.1%Ogle County: -0.8%Jersey County: -1.6%Iroquois County: -3.3%Kankakee County: -0.9%Rock Island County: -1.1%Pulaski County: -5.8%Kane County: +0.9%Union County: -2.4%Whiteside County: -1.7%Woodford County: -0.3%Carroll County: -1.5%Adams County: -2.3%Hardin County: -2.6%Madison County: -1.0%Hancock County: -3.1%Monroe County: +0.0%Tazewell County: -1.1%Jackson County: -0.1%Vermilion County: -3.9%Randolph County: -0.6%McLean County: +0.5%Morgan County: -2.6%Shelby County: -1.7%Will County: +1.7%Winnebago County: -0.4%Jefferson County: -2.4%Stark County: -2.2%Henderson County: -4.5%Pike County: -2.6%Franklin County: -1.8%
Change 2020 to 2024
  1. < -3.0%
  2. < -2.2%
  3. < -1.4%
  4. < -0.3%
  5. ≥ -0.3%
no data

Orange pin: McLean County internal point. Dark pin: Springfield.

Internal point

Decimal
40.494600, -88.844500
DMS
40°29'40.56"N 88°50'40.20"W
UTM
16N 343691.6E 4484289.5N
Geohash
dp0y67c6j
Plus code
86GHF5V4+R6

Towns in McLean County

10 incorporated places of 1,000+ people have residents in McLean County, 148,182 people together, or 86% of the county. Each figure counts only the part of the town inside McLean County; towns marked "part" extend into another county. The largest is Bloomington with 79,232.

  1. 01Bloomington79,232
  2. 02Normal53,304
  3. 03Le Roy3,495
  4. 04Heyworth2,883
  5. 05Lexington2,097
  6. 06Hudson1,767
  7. 07Chenoa1,699
  8. 08Gridley1,443
  9. 09Downs1,185
  10. 10Danvers1,077
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering McLean County

The Census 2024 county adjacency file lists 8 neighbors for McLean County. The most populous is Champaign County, IL, with 212,374 residents. Distances run between Census internal points in a straight line.

Distance to Springfield and the nearest big city

Springfield is 65.1 miles SW of McLean County's internal point in a straight line. The nearest place of 100,000 or more is Peoria, IL (population 111,696), 44.2 miles away. The nearest place of 10,000 or more is Bloomington, IL (population 79,232), 6.7 miles away.

McLean County FIPS code

The FIPS code of McLean County is 17113: state code 17 for Illinois plus county code 113. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $79,622.

Questions people ask

What is the population of McLean County, Illinois?

The Census Vintage 2024 estimate for July 1, 2024 is 172,069. That is up 833 people (0.5%) from the July 2020 estimate of 171,236.

What is the FIPS code of McLean County?

17113. The first two digits (17) are Illinois; the last three (113) identify the county.

What is the largest town in McLean County?

Bloomington, with 79,232 residents inside McLean County in 2024.

Which counties border McLean County?

8 county-equivalents border it in the Census 2024 adjacency file: Champaign County, IL; Tazewell County, IL; Woodford County, IL; Livingston County, IL; Logan County, IL; Piatt County, IL; De Witt County, IL; Ford County, IL.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.