Williamson County, Illinois

IL · FIPS 17199 · ACS 2024 5-Year Estimates

Key Statistics

Total Population
66,876
Rank #820 of 3,222
75th %ile
Median Household Income
$65,604 −12.7% vs nat'l
Rank #1,582 of 3,222
51th %ile
Poverty Rate
13.8% +9.2% vs nat'l
Rank #1,697 of 3,222
47th %ile
Median Home Value
$156,400 −44.5% vs nat'l
Rank #2,113 of 3,222
34th %ile
Bachelor's Degree or Higher
26.2% −22.1% vs nat'l
Rank #1,077 of 3,222
67th %ile
Unemployment Rate
5.0% −6.0% vs nat'l
Rank #1,999 of 3,222
38th %ile

At a Glance

70.7% Homeownership
95.4% Insured
26.2% Bachelor's+

Age & Sex Distribution

MaleFemale
0-910-1920-2930-3940-4950-5960-6970-7980+10%5%0%5%10%

Race & Ethnicity

White (non-Hispanic)Black (non-Hispanic)Two or More RacesHispanic or LatinoAsian (non-Hispanic)American Indian (non-Hispanic)Other (non-Hispanic)0.0%15.0%29.9%44.9%59.8%74.8%87.9%4.3%3.2%2.9%1.4%0.2%0.1%

About Williamson County, Illinois

Williamson County, Illinois has a total population of 66,876, making it the 820th most populous county in the United States. The median age in Williamson County is 41.6 years, which is 6.9% above the national median of 38.9 years.

The median household income in Williamson County is $65,604, which ranks #1,582 of 3,222 counties nationwide. This is 12.7% below the national median of $75,149. The poverty rate is 13.8%, higher than the national rate of 12.6%. The unemployment rate stands at 5.0%.

The median home value in Williamson County is $156,400, 44.5% below the national median. Renters in Williamson County pay a median gross rent of $930 per month. The homeownership rate is 70.7%, compared to the national rate of 64.4%.

In Williamson County, 26.2% of residents aged 25 and older hold a bachelor's degree or higher, 22.1% below the national average of 33.7%. Health insurance coverage stands at 95.4% of the population. The average commute time for workers is 25.3 min.

Williamson County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 87.9% of the population, followed by Black (non-Hispanic) (4.3%) and Two or More Races (3.2%).

All data for Williamson County, Illinois comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.

About this data

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.