Illiopolis, Sangamon County, Illinois
Village in Sangamon County, Illinois · ZIP 62539
- Sangamon County
- Within Illiopolis Township
- Census data · ACS 2019-2023
- 2 public schools
- 834 (2024 estimate)Population
- 357Households
- $74,219Median household income
- $96,500Median home value
- 2Public schools
- 1ZIP codes
About Illiopolis
This page shows only what has been published about Illiopolis: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.
Town intelligenceOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 916 |
| 2010 | 891 |
| 2020 | 846 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, place level, state 17, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 17, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 17, retrieved November 14, 2026.
Median household income $74,219 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 17, retrieved November 14, 2026.
- Owner occupied
- 286 units
- Renter occupied
- 71 units
- Vacancy rate
- 6.8%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, place level, state 17, retrieved November 14, 2026.
| Measure | Illiopolis | Sangamon County | Illinois |
|---|---|---|---|
| Population | 854 | 195,217 | 12,692,653 |
| Median household income | $74,219 | $74,114 | $81,702 |
| Median age | 45.5 | 40.8 | 38.9 |
| Median home value | $96,500 | $170,300 | $250,500 |
| Bachelor’s degree or higher | 18.4% | 35.1% | 37.2% |
| Foreign-born residents | 0.9% | 3.3% | 14.4% |
| Owner-occupied homes | 80.1% | 70.6% | 66.8% |
| Mean commute to work | 23.9 minutes | 19.5 minutes | 28.1 minutes |
Source: American Community Survey 5-year data profile 2019–2023, place level, state 17, retrieved November 14, 2026.
CommunityRules and moderation
Loading…
Events in IlliopolisAll events
No upcoming event is listed in Illiopolis yet. Members and businesses add events from the Events page; each is screened before it shows.
Schools
| School | Type | Grades | District |
|---|---|---|---|
| Sangamon Valley Intermediate Sch | Public | 3–5 | Sangamon Valley CUSD 9 |
| Sangamon Valley Middle School | Public | 6–8 | Sangamon Valley CUSD 9 |
Open public schools in the NCES directory for 2023–2024, placed by their listed location; private schools are not in the source. Enrollment and ratings are not shown.
Sources: NCES Common Core of Data, public school directory 2023–2024, retrieved November 14, 2026; NCES EDGE public school geocodes 2024–2025, retrieved November 14, 2026.
Frequently asked about IlliopolisPromoted from questions people asked
No question about Illiopolis has been asked often enough to publish an answer yet. Ask Illiopolis and the answer, once a person checks it, appears here.
Nearby towns
- Illiopolis TownshipTownship
- Lanesville TownshipTownship
- Niantic TownshipTownship
- NianticVillage
- Mount AuburnVillage
- Mosquito TownshipTownship
- Lake Fork TownshipTownship
- BuffaloVillage
- Harristown TownshipTownship
- Mount Auburn TownshipTownship
Other towns in Sangamon County
- AuburnCity
- Auburn TownshipTownship
- Ball TownshipTownship
- BerlinVillage
- BuffaloVillage
- Buffalo Hart TownshipTownship
- CantrallVillage
- Capital TownshipTownship
- Cartwright TownshipTownship
- ChathamVillage
Other places named Illiopolis in Illinois
- Illiopolis TownshipTownship