Warren County, Illinois
Warren County, Illinois · ZIP 61401, 61410, 61412
- Census data · ACS 2019-2023
- 16,217 (2024 estimate)Population
- 6,722Households
- $64,650Median household income
- $101,300Median home value
- 21Towns with a page
- 14ZIP codes
Warren County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 18,735 |
| 2010 | 17,707 |
| 2020 | 16,835 |
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, county level, state 17, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 17, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 17, retrieved November 14, 2026.
Median household income $64,650 · 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, county level, state 17, retrieved November 14, 2026.
- Owner occupied
- 5,251 units
- Renter occupied
- 1,471 units
- Vacancy rate
- 11.5%
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, county level, state 17, retrieved November 14, 2026.
5,447 employees in 351 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 17, retrieved November 14, 2026.
| Measure | Warren County | Illinois |
|---|---|---|
| Population | 16,576 | 12,692,653 |
| Median household income | $64,650 | $81,702 |
| Median age | 38.7 | 38.9 |
| Median home value | $101,300 | $250,500 |
| Bachelor’s degree or higher | 22.0% | 37.2% |
| Foreign-born residents | 6.2% | 14.4% |
| Owner-occupied homes | 78.1% | 66.8% |
| Mean commute to work | 19.4 minutes | 28.1 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 17, retrieved November 14, 2026.
Townships, towns and villages in Warren County21 with a page · sort by any column
| Type | |||
|---|---|---|---|
| Monmouth Township | Township | 9,628 | 36.8 sq mi |
| Monmouth | City | 8,639 | 4.25 sq mi |
| Roseville Township | Township | 1,112 | 36.6 sq mi |
| Spring Grove Township | Township | 927 | 36.8 sq mi |
| Tompkins Township | Township | 853 | 36.6 sq mi |
| Roseville | Village | 839 | 0.74 sq mi |
| Alexis | Village | 755 | 0.47 sq mi |
| Kirkwood | Village | 648 | 0.94 sq mi |
| Greenbush Township | Township | 514 | 35.5 sq mi |
| Sumner Township | Township | 476 | 37.1 sq mi |
| Coldbrook Township | Township | 420 | 35.6 sq mi |
| Floyd Township | Township | 398 | 35.8 sq mi |
| Cameron | Census designated place | 383 | 0.63 sq mi |
| Kelly Township | Township | 353 | 35.2 sq mi |
| Hale Township | Township | 320 | 36.5 sq mi |
| Ellison Township | Township | 300 | 36.4 sq mi |
| Berwick Township | Township | 296 | 35.7 sq mi |
| Little York | Village | 268 | 0.22 sq mi |
| Lenox Township | Township | 257 | 36.3 sq mi |
| Swan Township | Township | 231 | 35.3 sq mi |
| Point Pleasant Township | Township | 132 | 36.0 sq mi |
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 17 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across Warren County
No job is posted in Warren County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.
No upcoming event is listed in Warren County's towns yet. Members and businesses add events from any town page.
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Neighboring counties
Neighboring counties
- Fulton CountyPopulation 32,510 (2024 estimate)
- Henderson CountyPopulation 6,048 (2024 estimate)
- Knox CountyPopulation 48,716 (2024 estimate)
- McDonough CountyPopulation 26,662 (2024 estimate)
- Mercer CountyPopulation 15,292 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 17, retrieved November 14, 2026.