Hamilton County, Illinois

Hamilton County, Illinois, has 7,859 residents (July 2025 estimate). Its county seat is McLeansboro. It uses Central Time and covers 435 sq mi (1,126 km²) of land.

ChicagoAurora
Hamilton County in Illinois
Franklin CountyWhite CountyMcLeansboroDahlgrenBroughtonBelle Prairie CityMacedonia
Hamilton County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
7,859
Land area
435 sq mi (1,126 km²)
County seat or government
McLeansboro
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$65,746 ± $6,413
Median home value
$113,700 ± $12,488
Median rent, with utilities
$568 ± $54
Homes lived in by their owners
76.4% ± 4.3 points
County type
County
Metro or micro area
Outside any metro or micro areaNext to: Mount Vernon, IL micro area
Water area
1.22 sq mi (3.16 km²)
State
Illinois
County code (FIPS)
17065
Coordinates (central point)
38.085227, -88.539009

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 Hamilton 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. 629305,761 people
  2. 628595,004 people
  3. 628692,795 people
  4. 628902,377 people
  5. 629352,178 people
  6. 628951,960 people
  7. 628281,801 people
  8. 628351,398 people
  9. 628101,188 people
  10. 62817639 people
  11. 62860384 people
  12. 62887104 people
All 13
  1. 6282922 people

13 ZIP Code areas overlap Hamilton 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

Hamilton County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Hamilton County, largest first

  1. McLeansboro Township3,644 people
  2. Dahlgren Township1,390 people
  3. Mayberry Township557 people
  4. Knight Prairie Township530 people
  5. Crouch Township427 people
  6. Crook Township358 people
  7. Twigg Township301 people
  8. Flannigan Township266 people
  9. Beaver Creek Township148 people
  10. South Flannigan Township112 people
  11. South Crouch Township101 people
  12. South Twigg Township82 people

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

School districts in Hamilton County, largest first

  1. Benton Consolidated High School District 10312,750 people
  2. Hamilton County Community Unit School District 107,368 people
  3. Eldorado Community Unit School District 46,609 people
  4. Norris City-Omaha-Enfield Community Unit School District 34,765 people
  5. Wayne City Community Unit School District 1003,704 people
  6. Galatia Community Unit School District 12,322 people
  7. Thompsonville Community Unit School District 1741,792 people
  8. Akin Community Consolidated School District 91762 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. McLeansboro, Illinois (city)2,675 people
  2. Dahlgren, Illinois (village)595 people
  3. Broughton, Illinois (village)206 people
  4. Belle Prairie City, Illinois (town)72 people
  5. Macedonia, Illinois (village)31 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. White County, Illinois20 mi east
  2. Franklin County, Illinois22 mi west
  3. Saline County, Illinois23 mi south
  4. Wayne County, Illinois25 mi north
  5. Jefferson County, Illinois26 mi northwest

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.