Williamson County, Illinois

16 cities & places have their primary county here.

Population: 66,902
Median household income: $65,521
Median home value: $145,600

Williamson County is a county in Illinois with a population of 66,902. 16 cities and places have their primary county here. At $65,521, its median household income sits below Illinois's $81,702.

From 2019 to 2023, Williamson County's population held roughly steady from 67,102 to 66,902, while its median household income rose 29.1% from $50,734 to $65,521.

Owners occupy 71.1% of the area's occupied homes. The median resident is 41.4 years old.

Demographics

ACS 2019–2023

Population: 66,902
Median age: 41.4 yrs
Median household income: $65,521
Median home value: $145,600
Median gross rent: $897
Housing units: 31,957
Homeownership rate: 71.1%
Bachelor's degree or higher: 27.5%
Unemployment rate: 4.3%

Trends

ACS 5-year · 2019–2023

Population

67,10266,902

Median household income

$50,734$65,521

Median home value

$114,900$145,600

Median gross rent

$735$897

Year	Population	Median household income	Median home value	Median gross rent
2019	67,102	$50,734	$114,900	$735
2020	66,929	$52,076	$120,900	$725
2021	67,271	$54,682	$125,800	$779
2022	67,120	$60,325	$139,500	$824
2023	66,902	$65,521	$145,600	$897

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 55.4%

5 to 1716.1%

18 to 246.7%

25 to 3412.7%

35 to 4413.5%

45 to 5412.4%

55 to 6413.6%

65 to 7411.5%

75 and over8.1%

	Count	Share
Under 5	3,642	5.4%
5 to 17	10,773	16.1%
18 to 24	4,456	6.7%
25 to 34	8,525	12.7%
35 to 44	9,040	13.5%
45 to 54	8,291	12.4%
55 to 64	9,066	13.6%
65 to 74	7,676	11.5%
75 and over	5,433	8.1%

Race & ethnicity

	Count	Share
White (non-Hispanic)	59,028	88.2%
Black or African American	2,316	3.5%
American Indian & Alaska Native	189	0.3%
Asian	982	1.5%
Native Hawaiian & Pacific Islander	0	0.0%
Some other race	96	0.1%
Two or more races	2,410	3.6%
Hispanic or Latino (any race)	1,881	2.8%

Educational attainment (age 25+)

No high school diploma7.6%

High school graduate28.1%

Some college or associate's36.9%

Bachelor's degree16.5%

Graduate or professional degree11.0%

	Count	Share
No high school diploma	3,633	7.6%
High school graduate	13,489	28.1%
Some college or associate's	17,721	36.9%
Bachelor's degree	7,926	16.5%
Graduate or professional degree	5,262	11.0%

Commute to work

Mean travel time to work: 23 min

Drove alone81.5%

Carpooled7.6%

Public transit0.3%

Walked0.8%

Bicycle0.2%

Worked from home8.6%

Other means0.9%

How workers get to work

	Count	Share
Drove alone	24,055	81.5%
Carpooled	2,252	7.6%
Public transit	90	0.3%
Walked	235	0.8%
Bicycle	61	0.2%
Worked from home	2,543	8.6%
Other means	280	0.9%

Travel time

	Count	Share
Under 15 min	9,090	33.7%
15 to 29 min	10,219	37.9%
30 to 44 min	4,716	17.5%
45 to 59 min	1,467	5.4%
60+ min	1,481	5.5%

Households

Average household size: 2.25
Poverty rate: 14.3% (9,213 of 64,519)

	Count	Share
Family households	18,254	63.4%
Nonfamily households	10,520	36.6%

Housing

Median year structure built: 1981

Occupancy

	Count	Share
Occupied	28,774	90.0%
Vacant	3,183	10.0%

Tenure (of occupied units)

	Count	Share
Owner-occupied	20,467	71.1%
Renter-occupied	8,307	28.9%

1-unit, detached73.9%

1-unit, attached1.3%

2 to 4 units12.2%

5 to 19 units3.3%

20 or more units1.9%

Mobile home & other7.4%

Units in structure

	Count	Share
1-unit, detached	23,610	73.9%
1-unit, attached	428	1.3%
2 to 4 units	3,883	12.2%
5 to 19 units	1,051	3.3%
20 or more units	619	1.9%
Mobile home & other	2,366	7.4%

Geography

County GEOID: 17199
State: Illinois
Land area: 420 sq mi
Water area: 24 sq mi
Center point: 37.7304, -88.9300

Cities & places

Compare with nearby counties

Other counties in Illinois

101