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Williamson County, Illinois

County

Population: 66,902 (2023 estimate)

Located in Illinois

County-level Census Bureau data covering income, housing, demographics, education, employment, and more. Counties are the primary administrative division in the U.S. and the most common unit for comparing local conditions across a state.

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Data: U.S. Census Bureau, ACS 5-Year Estimates, 2023 (released December 2024).

Quick Facts — Williamson County

What is the median household income in Williamson County?
The median household income in Williamson County is $65,521 (U.S. Census Bureau ACS 5-Year Estimates, 2023).
What is the poverty rate in Williamson County?
The poverty rate in Williamson County is 10.1% (U.S. Census Bureau ACS 2023).
What is the median home value in Williamson County?
$145,600 (U.S. Census Bureau ACS 2023).
What is the average rent in Williamson County?
The median gross rent in Williamson County is $897 per month (U.S. Census Bureau ACS 2023).
What percentage of Williamson County residents have a college degree?
27.5% of adults in Williamson County hold a bachelor's degree or higher (U.S. Census Bureau ACS 2023).
Population
66,902
Median Income
$65,521
Median Home Value
$145,600
Poverty Rate
10.1%
Unemployment (ACS 2023)
4.3%
Median Age
41.0 yrs
Since 2019 Median Income: +$14,787 (+29.1%) Home Value: +$30,700 (+26.7%) Poverty Rate: +0.7 pp (+7.4%) Bachelor's+: +3.2 pp (+13.2%) Unemployment: -1.4 pp (-24.6%)

Demographics

Total Population 66,902
Median Age 41.0
Female 49.7%
Race & Ethnicity
Hispanic or Latino 2.8% White (non-Hisp.) 88.2% Black 3.5% Asian 1.6% Two or More 4.9% Other 0.3%
Asian Subgroups (% of total pop.)
Chinese
0.5%
Indian
0.3%
Filipino
0.3%
Vietnamese
0.2%
Hispanic Subgroups (% of total pop.)
Mexican
1.6%
Puerto Rican
0.5%
Cuban
0.2%

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Income & Poverty

Median Household Income $65,521 ±$3,734
-$16,181 vs. state
Per Capita Income $86,550
Median Family Income $85,336
Poverty Rate 10.1%
+1.9 pp vs. state
Child Poverty Rate 17.6%
Working-Age Poverty Rate
SNAP Recipients 16.3%
Social Security Income
Retirement Income 28.3%
Household Income Distribution
< $10k
5.3%
$10–15k
4.8%
$15–25k
7.1%
$25–35k
9.3%
$35–50k
12.5%
$50–75k
17.0%
$75–100k
12.1%
$100–150k
17.8%
$150–200k
8.2%
$200k+
6.0%

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Housing

Total Housing Units 31,957
Owner-Occupied 71.1%
Renter-Occupied 28.9%
Vacancy Rate 10.0%
Median Home Value $145,600
-$104,900 vs. state
Median Gross Rent $897
Owner Cost Burden (30%+) 13.6%
Renter Cost Burden (30%+) 35.8%
Home Value Distribution
< $50k
10.3%
$50–100k
20.1%
$100–200k
21.1%
$200–300k
18.9%
$300–500k
10.6%
$500k–$1M
1.9%
$1M+
0.9%
Gross Rent Distribution
< $500
18.4%
$500–1k
43.5%
$1–1.5k
30.9%
$1.5–2k
5.2%
$2–2.5k
1.0%
$2.5–3.5k
0.3%
$3.5k+
0.7%
Vehicle Availability
No vehicle
6.6%
1 vehicle
31.5%
2 vehicles
41.0%
3+
20.9%
Housing Type
Single-fam. det.
73.9%
Single-fam. att.
1.3%
2–4 units
7.4%
5–19 units
2.5%
20+ units
1.9%
Mobile home
7.2%
Housing Age
Pre-1940
14.2%
1940–1969
5.4%
1970–1999
14.3%
2000–2009
14.9%
2010+
11.2%

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Education

High School or Higher 92.4%
Bachelor's or Higher 27.5%
-9.7 pp vs. state
Graduate Degree 11.0%
Some College / Associate 25.4%
Less Than High School 2.3%
Enrolled in School

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Employment

Labor Force Participation 58.3%
Unemployment Rate 4.3%
-1.5 pp vs. state
Work from Home 8.6%
Self-Employed 6.2%
Government Workers 20.1%
Private For-Profit 73.6%
Industry
Edu/Health
30.8%
Retail
12.0%
Manufacturing
8.3%
Finance
8.3%
Arts/Entmt.
7.4%
Prof. Services
6.0%
Construction
5.4%
Transportation
5.4%
Public Admin
5.4%
Agriculture
2.8%
Wholesale
2.3%
Information
1.5%
Occupation
Management
39.8%
Sales
19.2%
Food Prep
18.9%
Production
12.9%
Construction
9.1%

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Commute

Median Travel Time 23.2 min
Drove Alone 81.5%
Carpool 7.6%
Public Transit 0.3%
Work from Home 8.6%
Walked 0.8%
Bicycle

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Households & Families

Total Households 28,774
Avg. Household Size 2.00
Avg. Family Size
Married-Couple Households 47.3%
Single-Mother Households
Single-Father Households
Living Alone
Households with Children 15.6%
Multigenerational

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Age Distribution

Under 5
5.4%
5–9
5.9%
10–14
6.5%
15–19
5.4%
20–24
4.9%
25–34
12.7%
35–44
13.5%
45–54
12.4%
55–64
6.5%
65–74
7.1%
75–84
11.5%
85+
6.2%
Under 18: 21.5% Working age (18–64): 78.5% 65 and over: 19.6%

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Social Characteristics

Immigration

Foreign Born 2.0%
Naturalized Citizen 41.0%
Speaks English Less Than Very Well 0.6%
Foreign-Born Origin
Asia
48.3%
Latin America
30.7%
Europe
9.6%
Africa
9.0%

Veterans & Disability

Veteran 8.7%
With a Disability 19.0%
Cognitive Difficulty
Ambulatory Difficulty

Health Insurance

Insured 94.8%
Uninsured 5.2%
Employer Insurance
Medicaid
Medicare

Technology & Mobility

Broadband Internet 86.8%
Has a Computer 92.1%
Same House 1 Year Ago 87.1%
Moved from Abroad 0.1%

Source: U.S. Census Bureau, ACS 5-Year Estimates, 2023

Compare Williamson County

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Where People Move From (IRS Migration Data)

Top origins of people who moved to Williamson County in 2023, by number of tax returns filed (IRS SOI Migration Data).

Origin Tax Returns People (est.)
Jackson County 277 502
Other flows - South 270 490
Franklin County 258 462
Other flows - Midwest 180 318
Saline County 97 188
Other flows - West 88 149
Johnson County 72 119
Union County 40 62
Jefferson County 40 73
Cook County 28 45