County · Illinois

Clinton County, Illinois

Clinton County, Illinois. Clinton County had 37,128 residents in 2025 by the Census Bureau's estimate, up 0.6% since 2020, while Illinois shrank 0.8%. It holds 31 places (16 cities, villages and boroughs and 15 towns and townships) and 9 census tracts. GEOID 17027.

Clinton County is one of the 15 counties of the St. Louis, MO-IL metropolitan statistical area (the Census Bureau's July 2023 delineation).

Residents, July 2025 estimate

37,128

Census Bureau estimate (no margin published)
2020 Census count: 36,899 · ACS 2020-2024: 36,954

Median household income

$86,588

±$4,464 (90% margin)
Illinois: $83,390

Median home value

$192,400

±$6,257 (90% margin)
Illinois: $263,300

Median gross rent

$912

±$52 (90% margin)
Illinois: $1,274

How many people live in Clinton County, and is it growing?

The 2020 Census counted 36,899 residents in Clinton County. The Census Bureau estimates 37,128 for July 1, 2025, up 0.6% since 2020, while Illinois shrank 0.8%. The 2020-2024 American Community Survey puts the population at 36,954 over 474 square miles of land.

July 2020→2021 +0 (36,915)
2021→2022 +136 (37,051)
2022→2023 −113 (36,938)
2023→2024 +150 (37,088)
2024→2025 +40 (37,128)

Clinton County in Illinois. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Clinton County	Illinois	Change since 2015-2019
Total population	36,954	12,694,798	−680
Households	14,570±257	5,036,449	no clear change
Average household size	2.39±0.04	2.46	−0.08
Housing units	15,765±92	5,457,452	no clear change

Clinton County's population since 2000

From 35,535 in 2000 to 37,128 in 2025: up 4.5%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.

2000 Census 35,535
2005 (estimate) 36,681
2010 Census 37,762
2015 (estimate) 37,657
2020 Census 36,899
2025 (estimate) 37,128

Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov

What cities and towns are in Clinton County?

Clinton County holds 31 places: 16 cities, villages and boroughs (incorporated places) and 15 towns and townships (county subdivisions with their own government). The largest is Sugar Creek Township with 6,723 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.

Places in Clinton County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Sugar Creek Township	township	6,643	6,689±25	$102,723	$235,500	6.5%	100%
Looking Glass Township	township	6,447	6,441±23	$92,163	$196,600	7.3%	100%
Breese Township	township	5,594	5,539±49	$87,194	$228,600	3.6%	100%
Breese	city	4,641	4,301±403	$85,222	$229,600	4.2%	100%
Brookside Township	township	4,444	4,413±29	$44,875	$94,600	25.3%	100%
Carlyle Township	township	3,842	3,798±23	$87,917	$168,000	6.6%	100%
Carlyle	city	3,253	2,980±253	$77,273	$155,000	7.9%	100%
New Baden	village	3,428	3,463±159	$81,393	$172,200	7.4%	94%
Trenton	city	2,690	2,664±15	$80,795	$178,200	12.4%	100%
Aviston	village	2,340	2,387±224	$117,875	$244,800	4.1%	100%
Centralia	city	12,182	11,856±176	$47,807	$89,600	24.3%	18%
Germantown Township	township	2,084	2,322±260	$96,806	$209,400	4.3%	100%
Wade Township, Clinton County	township	1,625	1,601±312	$64,191	$139,400	5.6%	100%
St. Rose Township	township	1,422	1,524±211	$107,458	$231,000	4.3%	100%
Germantown	village	1,324	1,350±203	$92,083	$192,500	5.4%	100%
Santa Fe Township	township	1,195	1,371±196	$89,079	$205,500	2.9%	100%
Albers	village	1,121	1,280±230	$109,583	$210,200	7.2%	100%
Irishtown Township	township	1,036	785±205	$51,833	$106,600	19.4%	100%
Beckemeyer	village	923	993±258	$63,603	$121,300	5.4%	100%
Lake Township	township	812	804±224	$73,448	$126,800	4.2%	100%
Bartelso	village	635	782±162	$90,000	$209,700	4.2%	100%
Damiansville	village	564	570±110	$105,000	$194,100	7.9%	100%
Clement TownshipGEOID 1702714884	township	481	458±108	$91,250	$152,000	9.0%	100%
Meridian Township	township	471	471±110	$75,938	$150,000	0.0%	100%
Wamac	city	985	804±194	$36,500	$20,100	27.7%	47%
St. Rose	village	459	593±139	$115,000	$206,000	8.1%	100%
Hoffman	village	439	607±202	$66,667	$106,700	5.6%	100%
Wheatfield TownshipGEOID 1702780996	township	438	386±105	$112,813	$244,800	0.0%	100%
East Fork Township, Clinton CountyGEOID 1702721748	township	365	352±115	$71,875	$218,800	3.4%	100%
Keyesport	village	406	635±244	$46,500	$72,500	26.2%	47%
HueyGEOID 1736477	village	160	109±43	$43,500	$83,000	17.8%	100%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov

Who lives in Clinton County?

The median resident of Clinton County is 41.5 years old; 21.6% are under 18 and 18.8% are 65 or older. The largest group is non-Hispanic white residents at 90.1%, then Hispanic or Latino residents (of any race) at 4.1%. 2.3% of residents were born outside the United States.

Age, origin and education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Clinton County	Illinois	Change since 2015-2019
Median age	41.5±0.7	39.0	+0.9
Under 18 years	21.6%±0.1 pts	21.8%	–
65 years and over	18.8%±0.2 pts	17.0%	–
Hispanic or Latino (any race)	4.1%	18.8%	+1.0 pts
White alone, not Hispanic	90.1%±0.2 pts	58.1%	−1.3 pts
Black or African American alone, not Hispanic	3.1%±0.3 pts	13.3%	no clear change
Asian alone, not Hispanic	0.6%±0.1 pts	5.9%	no clear change
American Indian and Alaska Native alone, not Hispanic	0.1%±0.1 pts	0.1%	–
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.0%±0.1 pts	0.0%	–
Two or more races, not Hispanic	2.0%±0.4 pts	3.4%	–
Some other race alone, not Hispanic	0.0%±0.1 pts	0.4%	–
Born outside the United States	2.3%±0.4 pts	14.7%	+0.6 pts
Speak a language other than English at home (age 5+)	4.2%±0.5 pts	24.0%	–
Civilian veterans (age 18+)	8.6%±0.9 pts	4.8%	–
With a disability	14.0%±1.2 pts	12.1%	–
No health insurance coverage	4.8%±0.8 pts	6.9%	no clear change
High school graduate or higher (age 25+)	92.2%±0.9 pts	90.5%	–
Bachelor's degree or higher (age 25+)	25.9%±1.8 pts	37.8%	+3.6 pts
Graduate or professional degree (age 25+)	8.3%±1.2 pts	15.3%	–
Moved from another state in the past year	1.7%±1.0 pts	1.6%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov

What do households in Clinton County earn?

Half of Clinton County's 14,570 households earn less than $86,588 a year (±$4,464), against $83,390 in Illinois. In 2015-2019 it was $82,012 in 2024 dollars; the margins of error cannot tell the two periods apart. 7.4% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Clinton County	Illinois	Change since 2015-2019
Median household income	$86,588±$4,464	$83,390	no clear change
Mean household income	$108,402±$6,098	$115,638	–
Per capita income	$42,658±$2,257	$46,406	+$3,543
People below the poverty line	7.4%±1.2 pts	11.8%	no clear change
Children under 18 below the poverty line	8.3%±2.5 pts	15.1%	no clear change
Households receiving SNAP	9.0%±1.6 pts	13.8%	–
Households with a broadband subscription	90.8%±1.3 pts	90.8%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What does housing cost in Clinton County?

Owners occupy 80.3% of Clinton County's occupied homes and renters 19.7%. The median owner-occupied home is valued at $192,400 by its owner (±$6,257). The median renter pays $912 a month including utilities, and 27.7% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Clinton County	Illinois	Change since 2015-2019
Median home value (owner-occupied)	$192,400±$6,257	$263,300	+$12,473
Median gross rent	$912±$52	$1,274	−$82
Renters paying 35% or more of income on rent	27.7%±6.7 pts	39.0%	no clear change
Median monthly owner costs, with a mortgage	$1,490±$53	$1,987	–
Owner-occupied homes	80.3%±1.8 pts	67.1%	no clear change
Housing units	15,765±92	5,457,452	no clear change
Homeowner vacancy rate	0.2%±0.2 pts	1.0%	–
Rental vacancy rate	4.5%±2.5 pts	5.0%	–
Single-family detached homes	80.9%±1.9 pts	58.2%	–
Mobile homes	8.7%±1.5 pts	2.3%	–
Built 2020 or later	1.4%±0.5 pts	0.7%	–
Built 1939 or earlier	13.4%±1.8 pts	20.2%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov

How many new homes is Clinton County building?

Builders took permits for 51 new housing units across Clinton County in 2025 (49 single-family), 1.4 per 1,000 residents.

2019 127 units
2020 102 units
2021 84 units
2022 67 units
2023 56 units
2024 67 units
2025 51 units

Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey

How do people in Clinton County get to work?

76.3% of Clinton County's workers drive alone and 12.6% work from home. The average trip to work takes 25.9 minutes. The unemployment rate in 2020-2024 averaged 3.4%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Clinton County	Illinois	Change since 2015-2019
In the labor force (age 16+)	62.8%±1.4 pts	65.0%	–
Unemployment rate	3.4%±0.9 pts	5.8%	no clear change
Drove alone to work	76.3%±2.3 pts	65.9%	–
Carpooled	7.6%±1.5 pts	7.8%	–
Public transportation	0.3%±0.2 pts	5.8%	–
Walked	2.6%±0.8 pts	2.8%	–
Worked from home	12.6%±2.0 pts	15.9%	+9.7 pts
Mean travel time to work	25.9 min±1.3	27.8 min	no clear change

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What are Clinton County's census tracts?

Clinton County is divided into 9 census tracts. Among those with a reliable estimate, median household income runs from $56,838 (Tract 9004.04) to $111,607 (Tract 9002).

Census tracts of Clinton County, ACS 2020-2024 5-year estimates; sort by any column

Tract 900117027900100	Trenton (44%)	6,512	6,613±64	$103,504	$233,400	$894	6.6%
Tract 900217027900200	St. Rose (9%)	1,910	1,940±191	$111,607	$237,500	$943	3.4%
Tract 900317027900300	Breese (48%)	6,928	6,920±345	$85,533	$215,000	$786	4.1%
Tract 9004.0117027900401	Huey (9%)	1,201	1,200±128	$83,315	$162,200	$974	2.8%
Tract 9004.0317027900403	Carlyle (75%)	3,921	3,548±172	$79,625	$164,300	$973	7.4%
Tract 9004.0417027900404	Keyesport (18%)	1,403	1,264±217	$56,838	$141,000	not published	13.3%
Tract 900517027900500	Centralia (27%)	5,664	5,701±228	$58,971	$107,700	$659	18.3%
Tract 9006.0117027900601	Germantown (45%)	2,460	2,969±259	$87,150	$205,700	$838	4.5%
Tract 9006.0217027900602	New Baden (27%)	6,900	6,799±123	$92,056	$202,000	$1,117	6.9%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

How does Clinton County compare with Illinois's other counties?

Clinton County's rank among Illinois's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	37th of 102
Growth 2020-2025	12th of 102
Residents per square mile	31st of 102
Median household income	12th of 102
Median home value	17th of 102
Median gross rent	25th of 102
Poverty rate	93rd of 102
Bachelor's degree or higher	27th of 102
Median age	62nd of 102

Every county in Illinois

Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections

Not on this page: crime, weather and schools for Clinton County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.