Hancock County, Illinois
Hancock County, Illinois, has 16,803 residents (July 2025 estimate). Its county seat is Carthage. It uses Central Time and covers 794 sq mi (2,056 km²) of land.
- Resident population, July 2025
- 16,803
- Land area
- 794 sq mi (2,056 km²)
- County seat or government
- Carthage
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $65,865 ± $3,254
- Median home value
- $113,800 ± $4,244
- Median rent, with utilities
- $782 ± $54
- Homes lived in by their owners
- 81.3% ± 1.8 points
- County type
- County
- Metro or micro area
- Outside any metro or micro areaNext to: Fort Madison, IA micro area, Macomb, IL micro area, Burlington, IA-IL micro area, and Quincy, IL-MO micro area
- Water area
- 20.7 sq mi (53.6 km²)
- State
- Illinois
- County code (FIPS)
- 17067
- Coordinates (central point)
- 40.401318, -91.168801
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 Hancock County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-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
- 623213,576 people
- 623413,433 people
- 623262,236 people
- 623511,928 people
- 623791,854 people
- 614501,812 people
- 623301,472 people
- 623541,447 people
- 623671,294 people
- 61420968 people
- 62311872 people
- 62316705 people
All 20
20 ZIP Code areas overlap Hancock 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 Hancock County, largest first
- Montebello Township3,284 people
- Carthage Township2,922 people
- La Harpe Township1,607 people
- Warsaw Township1,518 people
- Nauvoo Township962 people
- Dallas City Township855 people
- Augusta Township828 people
- St. Mary Township646 people
- Chili Township628 people
- Sonora Township438 people
- Prairie Township382 people
- Appanoose Township370 people
All 24
- Wythe Township369 people
- St. Albans Township360 people
- Walker Township274 people
- Bear Creek Township258 people
- Pontoosuc Township258 people
- Harmony Township243 people
- Durham Township228 people
- Rocky Run-Wilcox Township199 people
- Rock Creek Township195 people
- Pilot Grove Township178 people
- Fountain Green Township161 people
- Hancock Township118 people
People counts are American Community Survey 2020–2024 5-year estimates. All townships in Illinois, by county
School districts in Hancock County, largest first
- Illini West High School District 3077,567 people
- West Prairie Community Unit School District 1034,435 people
- Community Unit School District 44,095 people
- Hamilton Community Consolidated School District 3283,791 people
- Carthage Elementary School District 3173,687 people
- Southeastern Community Unit School District 3373,120 people
- Warsaw Community Unit School District 3162,425 people
- La Harpe Community School District 3472,038 people
- Dallas Elementary School District 3271,842 people
- Nauvoo-Colusa Community Unit School District 3251,821 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.
- Hamilton, Illinois (city)2,714 people
- Carthage, Illinois (city)2,291 people
- Warsaw, Illinois (city)1,518 people
- La Harpe, Illinois (city)1,273 people
- Nauvoo, Illinois (city)931 people
- Dallas City, Illinois (city)894 people
- Augusta, Illinois (village)669 people
- Bowen, Illinois (village)552 people
- Plymouth, Illinois (village)456 people
- West Point, Illinois (village)201 people
- Elvaston, Illinois (village)163 people
- Pontoosuc, Illinois (village)108 people
All 16
- Ferris, Illinois (village)105 people
- Basco, Illinois (village)59 people
- Niota, Illinois (CDP)39 people
- Bentley, Illinois (town)22 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Lee County, Iowa23 mi northwest
- McDonough County, Illinois26 mi east
- Adams County, Illinois29 mi south
- Clark County, Missouri30 mi west
- Henderson County, Illinois31 mi northeast
- Schuyler County, Illinois34 mi southeast
- Lewis County, Missouri37 mi southwest
Before using this answer on a form
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