• county
  • FIPS 17027
  • Largest town: Breese

Clinton County, Illinois

Clinton County had 37,087 residents in the Census Vintage 2024 estimate, on 473.9 square miles of land. It ranks 35th of 102 in Illinois by population and 58th by land area.

Population
37,087
#35 of 102 in Illinois · #1,258 in US
Area
473.9 sq mi
#58 of 102 in Illinois · #2,175 in US
Density
78 / sq mi
#30 of 102 in Illinois · #1,093 in US
Median household income
$88,977
#10 of 102 in Illinois · #260 in US

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

Clinton County within Illinois. Pin: Springfield.

Measure from here

Tools and pages that start from Clinton County

Clinton County population, land area and income

Clinton County had 37,087 residents in the Census Vintage 2024 estimate, on 473.9 square miles of land. It ranks 35th of 102 in Illinois by population and 58th by land area. That works out to 78.3 people per square mile, near the US average of 96.3, and above the national county median.

The median county-equivalent in Illinois has 24,447 residents; Clinton County is somewhat larger.

Its SAIPE 2023 median household income of $88,977 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

37,087

3144th1st

1258th of 3,144 (US)

Land area

474 sq mi

3144th1st

2175th of 3,144 (US)

Density

78.3 / sq mi

3144th1st

1093rd of 3,144 (US)

Median household income

$88,977

3143rd1st

260th of 3,143 (US)

Rank within Illinois (102)

Population

37,087

102nd1st

35th of 102 (IL)

Land area

474 sq mi

102nd1st

58th of 102 (IL)

Density

78.3 / sq mi

102nd1st

30th of 102 (IL)

Median household income

$88,977

102nd1st

10th of 102 (IL)

How Clinton County's population changed since 2020

Clinton County gained 174 residents between the July 2020 and July 2024 estimates, a rise of 0.5%. That ranks 12th 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, Clinton County recorded 1,652 births and 1,586 deaths, a natural change of +66. Net international migration added +260 and net domestic migration, people moving to or from other US counties, came to -155. The largest single component was international migration, which added 260 people.

36.9k202036.9k202137.0k202236.9k202337.1k2024
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
1,652
Deaths
1,586
Net international migration
+260
Net domestic migration
-155
Change, July 2023 to July 2024
+201

Where Clinton County is

The Census internal point of Clinton County is at 38.606300, -89.426200. 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 Clinton 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: Clinton County internal point. Dark pin: Springfield.

Internal point

Decimal
38.606300, -89.426200
DMS
38°36'22.68"N 89°25'34.32"W
UTM
16N 288737.7E 4275880.7N
Geohash
dnb7th1cf
Plus code
86CGJH4F+GG

Towns in Clinton County

8 incorporated places of 1,000+ people have residents in Clinton County, 20,765 people together, or 56% of the county. Each figure counts only the part of the town inside Clinton County; towns marked "part" extend into another county. The largest is Breese with 4,629.

  1. 01Breese4,629
  2. 02Carlyle3,208
  3. 03New Baden (part)3,186
  4. 04Trenton2,656
  5. 05Aviston2,434
  6. 06Centralia (part)2,142
  7. 07Germantown1,387
  8. 08Albers1,123
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Clinton County

The Census 2024 county adjacency file lists 6 neighbors for Clinton County. The most populous is Madison County, IL, with 263,017 residents. Distances run between Census internal points in a straight line.

Distance to Springfield and the nearest big city

Springfield is 82.0 miles N of Clinton County's internal point in a straight line. The nearest place of 100,000 or more is St. Louis, MO (population 279,695), 44.2 miles away. The nearest place of 10,000 or more is Centralia, IL (population 11,787), 17.3 miles away.

Clinton County FIPS code

The FIPS code of Clinton County is 17027: state code 17 for Illinois plus county code 027. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $88,977.

Questions people ask

What is the population of Clinton County, Illinois?

The Census Vintage 2024 estimate for July 1, 2024 is 37,087. That is up 174 people (0.5%) from the July 2020 estimate of 36,913.

What is the FIPS code of Clinton County?

17027. The first two digits (17) are Illinois; the last three (027) identify the county.

What is the largest town in Clinton County?

Breese, with 4,629 residents inside Clinton County in 2024.

Which counties border Clinton County?

6 county-equivalents border it in the Census 2024 adjacency file: Madison County, IL; St. Clair County, IL; Marion County, IL; Fayette County, IL; Bond County, IL; Washington 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.