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Where am ILOCATED

Clinton County, Illinois

Clinton County, Illinois, has 37,128 residents (July 2025 estimate). Its county seat is Carlyle. It uses Central Time and covers 474 sq mi (1,228 km²) of land.

ChicagoAurora
Clinton County in Illinois
CentraliaBreeseNew BadenCarlyleTrenton
Clinton County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
37,128
Land area
474 sq mi (1,228 km²)
County seat or government
Carlyle
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$86,588 ± $4,464
Median home value
$192,400 ± $6,257
Median rent, with utilities
$912 ± $52
Homes lived in by their owners
80.3% ± 1.4 points
County type
County
Metro or micro area
St. Louis, MO-IL metro areaOutlying county
Water area
29.2 sq mi (75.6 km²)
State
Illinois
County code (FIPS)
17027
Coordinates (central point)
38.606295, -89.426228
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Clinton County

Time zoneLocal time and UTC offsetNext clock change
Central TimeAmerica/ChicagoUTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 6280119,827 people
  2. 6224916,205 people
  3. 622306,377 people
  4. 622316,377 people
  5. 622654,555 people
  6. 622934,433 people
  7. 622163,156 people
  8. 622753,012 people
  9. 628822,057 people
  10. 622182,018 people
  11. 622151,917 people
  12. 622451,861 people
All 17
  1. 628751,039 people
  2. 62219993 people
  3. 62253932 people
  4. 62250607 people
  5. 62266103 people

17 ZIP Code areas overlap Clinton County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Clinton County, largest first

  1. Sugar Creek Township6,689 people
  2. Looking Glass Township6,441 people
  3. Breese Township5,539 people
  4. Brookside Township4,413 people
  5. Carlyle Township3,798 people
  6. Germantown Township2,322 people
  7. Wade Township1,601 people
  8. St. Rose Township1,524 people
  9. Santa Fe Township1,371 people
  10. Lake Township804 people
  11. Irishtown Township785 people
  12. Meridian Township471 people
All 15
  1. Clement Township458 people
  2. Wheatfield Township386 people
  3. East Fork Township352 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Illinois, by county

School districts in Clinton County, largest first

  1. Centralia High School District 20019,500 people
  2. Central Community High School District 7117,558 people
  3. Centralia School District 13512,655 people
  4. Carlyle Community Unit School District 19,230 people
  5. Wesclin Community Unit School District 37,837 people
  6. Breese School District 127,030 people
  7. Aviston School District 213,171 people
  8. Sandoval Community Unit School District 5012,392 people
  9. Germantown School District 602,138 people
  10. Albers School District 631,524 people
  11. Bartelso School District 571,463 people
  12. Willow Grove School District 461,463 people
All 16
  1. St. Rose School District 14-151,312 people
  2. Patoka Community Unit School District 1001,220 people
  3. Damiansville School District 62920 people
  4. North Wamac School District 186573 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Centralia, Illinois (city)11,856 people
  2. Breese, Illinois (city)4,301 people
  3. New Baden, Illinois (village)3,463 people
  4. Carlyle, Illinois (city)2,980 people
  5. Trenton, Illinois (city)2,664 people
  6. Aviston, Illinois (village)2,387 people
  7. Germantown, Illinois (village)1,350 people
  8. Albers, Illinois (village)1,280 people
  9. Beckemeyer, Illinois (village)993 people
  10. Wamac, Illinois (city)804 people
  11. Bartelso, Illinois (village)782 people
  12. Keyesport, Illinois (village)635 people
All 16
  1. Hoffman, Illinois (village)607 people
  2. St. Rose, Illinois (village)593 people
  3. Damiansville, Illinois (village)570 people
  4. Huey, Illinois (village)109 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Washington County, Illinois17 mi south
  2. Bond County, Illinois19 mi north
  3. Marion County, Illinois27 mi east
  4. St. Clair County, Illinois29 mi west
  5. Madison County, Illinois30 mi northwest
  6. Fayette County, Illinois35 mi northeast

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.