Williamson County, Illinois
Williamson County, Illinois · ZIP 62841, 62890, 62896
- Census data · ACS 2019-2023
- 67,064 (2024 estimate)Population
- 28,774Households
- $65,521Median household income
- $145,600Median home value
- 16Towns with a page
- 19ZIP codes
Williamson County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 61,296 |
| 2010 | 66,357 |
| 2020 | 67,153 |
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 $65,521 · 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
- 20,467 units
- Renter occupied
- 8,307 units
- Vacancy rate
- 10%
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.
26,291 employees in 1,597 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 | Williamson County | Illinois |
|---|---|---|
| Population | 66,902 | 12,692,653 |
| Median household income | $65,521 | $81,702 |
| Median age | 41.4 | 38.9 |
| Median home value | $145,600 | $250,500 |
| Bachelor’s degree or higher | 27.5% | 37.2% |
| Foreign-born residents | 2.0% | 14.4% |
| Owner-occupied homes | 71.1% | 66.8% |
| Mean commute to work | 23.2 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 Williamson County16 with a page · sort by any column
| Type | |||
|---|---|---|---|
| Marion | City | 17,021 | 14.4 sq mi |
| Herrin | City | 12,253 | 9.67 sq mi |
| Carterville | City | 5,821 | 5.30 sq mi |
| Johnston City | City | 3,309 | 2.12 sq mi |
| Cambria | Village | 1,793 | 1.41 sq mi |
| Crainville | Village | 1,493 | 1.65 sq mi |
| Energy | Village | 956 | 1.20 sq mi |
| Hurst | City | 750 | 0.89 sq mi |
| Pittsburg | Village | 561 | 2.06 sq mi |
| Creal Springs | City | 498 | 1.03 sq mi |
| Crab Orchard | Census designated place | 359 | 1.39 sq mi |
| Whiteash | Census designated place | 320 | 0.87 sq mi |
| Blairsville | Census designated place | 279 | 1.01 sq mi |
| Bush | Village | 237 | 0.45 sq mi |
| Spillertown | Village | 177 | 0.53 sq mi |
| Colp | Village | 175 | 0.13 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 Williamson County
No job is posted in Williamson 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 Williamson County's towns yet. Members and businesses add events from any town page.
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Neighboring counties
Neighboring counties
- Franklin CountyPopulation 37,033 (2024 estimate)
- Jackson CountyPopulation 53,199 (2024 estimate)
- Johnson CountyPopulation 13,320 (2024 estimate)
- Saline CountyPopulation 22,826 (2024 estimate)
- Union CountyPopulation 16,886 (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.