Williamson County, Illinois

Total Population: 66,902

County Seat: Marion

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Median Home Value

$145,600

Owner-occupied units

Median Household Income

$65,521

Across all households

Median Age

41.4 yrs

Across all residents

Bachelor's Degree+

27.5%

Adults 25 and older

Nearby Counties

Demographics

14 fields

Racial & Ethnic Composition

White (Non-Hispanic)88.2%
Two or More Races3.6%
Black (Non-Hispanic)3.5%
Hispanic or Latino2.8%
Asian (Non-Hispanic)1.5%
Am. Indian / Alaska Native0.3%
Other Race0.1%

Under 18 Years

21.5%

65 Years and Over

19.6%

Male

50.3%

Female

49.7%

U.S. Citizens (18+)

98.6%

No Health Insurance

5.2%

Education

3 fields

High School Graduate or Higher (25+)

92.4%

Bachelor's Degree or Higher (25+)

27.5%

Enrolled in College (18+)

5.5%

Economics

6 fields

Median Household Income

$65,521

Mean Household Income

$85,557

Per Capita Income

$37,096

Unemployment Rate (16+)

4.3%

In Labor Force (19–64)

77.8%

SNAP / Food Stamps

16.3%

Housing & Households

13 fields

Median Home Value

$145,600

Median Rent

$897/mo

Total Housing Units

31,957

Owner-Occupied

71.1%

Renter-Occupied

28.9%

Vacancy Rate

10.0%

Married Couple Households

47.3%

Cohabiting Couple Households

7.0%

Male Householder, No Partner

18.4%

Female Householder, No Partner

27.3%

Average Household Size

2.25

Broadband Internet Access

86.8%

Housing Built Since 2010

11.9%

Source: U.S. Census Bureau, American Community Survey 2023 5-Year Estimates. County FIPS 17199.