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Where am ILOCATED

Mason County, Illinois

Mason County, Illinois, has 12,411 residents (July 2025 estimate). Its county seat is Havana. It uses Central Time and covers 539 sq mi (1,397 km²) of land.

ChicagoAurora
Mason County in Illinois
HavanaMason CityManitoSan JoseEaston
Mason County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
12,411
Land area
539 sq mi (1,397 km²)
County seat or government
Havana
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$62,845 ± $5,651
Median home value
$103,400 ± $5,819
Median rent, with utilities
$802 ± $125
Homes lived in by their owners
81.8% ± 2.4 points
County type
County
Metro or micro area
Outside any metro or micro areaNext to: Canton, IL micro area, Lincoln, IL micro area, Springfield, IL metro area, and Peoria, IL metro area
Water area
24.2 sq mi (62.7 km²)
State
Illinois
County code (FIPS)
17125
Coordinates (central point)
40.236993, -89.913575
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 Mason 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. 626444,615 people
  2. 615463,849 people
  3. 626642,922 people
  4. 626271,006 people
  5. 62682684 people
  6. 62633638 people
  7. 62655594 people
  8. 62617524 people
  9. 61567411 people
  10. 62671362 people
  11. 61532347 people

11 ZIP Code areas overlap Mason 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

Mason 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 Mason County, largest first

  1. Havana Township4,270 people
  2. Mason City Township2,372 people
  3. Manito Township2,053 people
  4. Quiver Township689 people
  5. Bath Township652 people
  6. Kilbourne Township549 people
  7. Sherman Township537 people
  8. Forest City Township440 people
  9. Allens Grove Township395 people
  10. Pennsylvania Township367 people
  11. Salt Creek Township201 people
  12. Lynchburg Township136 people
All 13
  1. Crane Creek Township84 people

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

School districts in Mason County, largest first

  1. Lincoln Community High School District 40419,952 people
  2. Havana Community Unit School District 1265,800 people
  3. Midwest Central Community Unit School District 1915,009 people
  4. Illini Central Community Unit School District 1894,543 people
  5. New Holland-Middletown Elementary School District 88830 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. Havana, Illinois (city)2,989 people
  2. Mason City, Illinois (city)2,159 people
  3. Manito, Illinois (village)1,692 people
  4. San Jose, Illinois (village)557 people
  5. Easton, Illinois (village)285 people
  6. Kilbourne, Illinois (village)268 people
  7. Bath, Illinois (village)224 people
  8. Forest City, Illinois (village)223 people
  9. Goofy Ridge, Illinois (CDP)125 people
  10. Topeka, Illinois (village)47 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Menard County, Illinois16 mi southeast
  2. Fulton County, Illinois22 mi northwest
  3. Cass County, Illinois26 mi southwest
  4. Tazewell County, Illinois28 mi northeast
  5. Logan County, Illinois30 mi east
  6. Schuyler County, Illinois37 mi west

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.