Illiopolis Township, Sangamon County, Illinois
Illiopolis Township is a township in Sangamon County, Illinois. About 1,488 people live there (2020–2024 estimate). It covers 34 sq mi (88 km²) of land and uses Central Time. It has its own local government.
- Population, 2020–2024 estimate
- 1,488 ± 236
- County
- Sangamon County
- School district
- Sangamon Valley Community Unit School District 9
- Land area
- 34 sq mi (88 km²)
- Type
- TownshipIts own local government
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $83,000 ± $21,903
- Median home value
- $138,300 ± $39,443
- State
- Illinois
- Census code (GEOID)
- 1716737140
- Coordinates (central point)
- 39.861272, -89.262121
These coordinates mark a central point for the area, not a street address. Population, income and home value: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 20, 2026.
Census place in Illiopolis Township
- Illiopolis (village)890 people
This place’s central point lies inside Illiopolis Township. A place can reach across the line, and its government, if it has one, can be separate from the township’s.
Bordering areas, nearest first
- Lanesville Township4.1 mi west
- Niantic Township, Macon County4.9 mi east
- Lake Fork Township, Logan County6.3 mi northeast
- Mosquito Township, Christian County7.7 mi south
- Mount Pulaski Township, Logan County8.8 mi north
- Mount Auburn Township, Christian County9.1 mi south
These towns, townships, cities and boroughs share a boundary with Illiopolis Township. Distances are straight lines between central points, not driving distances.
Other townships in Sangamon County, largest first
- Capital Township111,650 people
- Woodside Township11,416 people
- Chatham Township8,443 people
- Clear Lake Township8,302 people
- Ball Township7,571 people
- Auburn Township5,866 people
- Fancy Creek Township5,826 people
- Rochester Township5,538 people
- Springfield Township5,522 people
- Gardner Township4,608 people
- Williams Township3,422 people
- Pawnee Township2,985 people
All 25
- Mechanicsburg Township2,301 people
- Curran Township1,625 people
- Divernon Township1,561 people
- New Berlin Township1,481 people
- Loami Township1,169 people
- Cartwright Township1,129 people
- Cotton Hill Township1,099 people
- Cooper Township763 people
- Island Grove Township467 people
- Maxwell Township238 people
- Talkington Township161 people
- Lanesville Township160 people
- Buffalo Hart Township156 people
People counts are American Community Survey 2020–2024 5-year estimates. See Sangamon County for its cities, ZIP Code areas and county seat.
Sunrise and sunset in Illiopolis Township
- Longest day
- 15 hours around June 21
- Shortest day
- 9 hours 21 minutes around December 21
- Earliest sunrise
- 5:28 AM around June 14
- Latest sunrise
- 7:31 AM the day before clocks go back in November
- Earliest sunset
- 4:31 PM around December 7
- Latest sunset
- 8:29 PM around June 27
Clocks go forward an hour on the second Sunday in March and back on the first Sunday in November, so sunrise and sunset jump an hour later in March and an hour earlier in November.
| Day | Sunrise | Sunset | Daylight |
|---|---|---|---|
| Jan 15 | 7:16 AM | 4:56 PM | 9 h 40 min |
| Feb 15 | 6:49 AM | 5:33 PM | 10 h 44 min |
| Mar 15 | 7:08 AM | 7:03 PM | 11 h 55 min |
| Apr 15 | 6:19 AM | 7:35 PM | 13 h 16 min |
| May 15 | 5:42 AM | 8:05 PM | 14 h 23 min |
| Jun 15 | 5:28 AM | 8:27 PM | 14 h 59 min |
| Jul 15 | 5:41 AM | 8:24 PM | 14 h 43 min |
| Aug 15 | 6:08 AM | 7:53 PM | 13 h 45 min |
| Sep 15 | 6:37 AM | 7:05 PM | 12 h 28 min |
| Oct 15 | 7:07 AM | 6:17 PM | 11 h 10 min |
| Nov 15 | 6:41 AM | 4:41 PM | 10 h |
| Dec 15 | 7:11 AM | 4:33 PM | 9 h 22 min |
Approximate times for a flat horizon at the central point; the days move by a day or so from year to year. Hills and weather can change what you see.
Before using this answer on a form
A township line is not always the line on your mail: a mailing address can name another town or post office, and school districts, ZIP Codes and tax districts follow their own lines. For taxes, voting or permits, check the full address with Sangamon County or the local office.
Find the township or town where you are now or find your county.