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COUNTY

Williamson County

Illinois · 67,225 residents (2025 est.) · 420.21 sq mi
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The short version

Williamson County has lower-than-average household income, with a median household income of $65,604. Population has held roughly steady since 2000. Median home value has more than doubled since 2000, reaching $156,400.

At a glance
Lower income
below the US median
US median: $82,259
Older
median age 41.6
US median: 38.9
Less educated
26% hold a bachelor's degree
US average: 36%
Less affordable
home values up 40%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
66,876
+9%since 2000
from 61,296 in 2000
1990 – 2025
Population density
159 / sq mi
+9%since 2000
from 146 / sq mi in 2000
US average: 281
Median age
41.6
+7%since 2000
from 38.8 in 2000
US average: 38.9

PEP 2025 EST:67,225 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
57K60K63K66K68K1990201020202024Williamson County
202467K
1990201020202024
Section 02

Income & economy

Median household income
$65,604
+13%inflation adjusted, since 2000
from $31,991 in 2000
US average: $82,259
1990 – 2024
Per capita income
$37,284
+110%since 2000
from $17,779 in 2000
US average: $44,673
Households earning $100K+
43.6%
+23.9 ptssince 2009
from 19.7% in 2009
US average: 53.3%
Poverty rate
13.8%
−0.8 ptssince 2000
from 14.6% in 2000
US average: 12.5%
Income inequality (Gini)
0.442
Unchangedsince 2010
from 0.443 in 2010
US average: 0.476
Workforce by industry, 2024
Information12.6%
US avg: 10.8%
Retail trade9.2%
US avg: 9.9%
Other services8.7%
US avg: 6.7%
Public administration6.1%
US avg: 4.8%
Wholesale trade5.6%
US avg: 6.9%
Finance & insurance4.8%
US avg: 5.9%
Professional, scientific, technical3.6%
US avg: 5.1%
Agriculture, forestry, fishing2.8%
US avg: 1.6%
Transportation & warehousing2.8%
US avg: 2.2%
Construction1.8%
US avg: 1.2%
Arts, entertainment, food1.6%
US avg: 1.9%
Education & health services1.2%
US avg: 0.9%
Manufacturing1%
US avg: 0.4%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$156,400
+40%inflation adjusted, since 2000
from $61,200 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$930
+28%inflation adjusted, since 2000
from $400 in 2000
US average: $1,442
Owner-occupied
70.7%
−3.0 ptssince 2000
from 73.6% in 2000
29.3% rent
Vacancy rate
9.7%
−1.8 ptssince 2009
from 11.4% in 2009
US average: 10.0%
Owner cost-burdened
17.4%
−2.2 ptssince 2009
from 19.6% in 2009
US average: 22.9%
Renter cost-burdened
42.8%
+1.0 ptssince 2009
from 41.8% in 2009
US average: 47.4%
Afford Score
2.4
+25%since 2000
from 1.9 in 2000
1990 – 2024
Gentrification Score
57
RELATED:See current rent listings in Williamson County on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic94.6%(58,006)
Black2.4%(1,498)
Hispanic / Latino1.2%(763)
Asian0.5%(304)
Other0%
Diversity Score10.3%(6,291)
Segregation Score0%
2024
White, non-Hispanic87.9%(58,776)
Black4.3%(2,864)
Hispanic / Latino2.9%(1,947)
Asian1.4%(935)
Other3.5%(2,354)
Diversity Score27.9%(18,680)
Segregation Score20.4%(13,657)
Diversity Score
28
+172%since 2000
from 10 in 2000
1990 – 2024
Segregation Score
20
−31%since 2020
from 30 in 2020
Section 05

Education

Bachelor's degree or higher
26.2%
+9.1 ptssince 2000
from 17.2% in 2000
US average: 35.6%
High school or higher
92.8%
+13.0 ptssince 2000
from 79.8% in 2000
US average: 89.6%
Graduate degree
10.6%
+4.5 ptssince 2000
from 6.1% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
23.5 min
+61%since 2000
from 14.5 min in 2000
US average: 26.5
Drive alone to work
82.1%
−4.7 ptssince 2009
from 86.8% in 2009
US average: 68.9%
Carpooled to work
7.2%
−0.6 ptssince 2009
from 7.8% in 2009
US average: 8.5%
Public transit
0.3%
+0.2 ptssince 2009
from 0.1% in 2009
US average: 3.2%
Worked from home
8.8%
+6.6 ptssince 2009
from 2.2% in 2009
US average: 15.0%
Walked to work
0.5%
−1.7 ptssince 2009
from 2.1% in 2009
US average: 2.4%
Biked to work
0.1%
−0.1 ptssince 2009
from 0.2% in 2009
US average: 0.4%
No vehicle available
6.0%
−0.1 ptssince 2009
from 6.1% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
5.0%
−3.6 ptssince 2011
from 8.6% in 2011
US average: 5.2%
Labor force participation
58.8%
−0.7 ptssince 2011
from 59.5% in 2011
US average: 63.5%
Self-employed
15.8%
+1.3 ptssince 2009
from 14.6% in 2009
US average: 13.1%
Management & professional
38.6%
−23.3 ptssince 2009
from 61.9% in 2009
US average: 42.5%
Section 08

People & community

Male
50.2%
+1.6 ptssince 2009
from 48.6% in 2009
Female
49.8%
−1.6 ptssince 2009
from 51.4% in 2009
Foreign born
2.0%
+0.5 ptssince 2009
from 1.5% in 2009
US average: 14.1%
Veterans
8.7%
−39.5 ptssince 2009
from 48.2% in 2009
US average: 6.2%
With a disability
19.1%
+3.4 ptssince 2012
from 15.7% in 2012
US average: 13.3%
Uninsured
4.6%
−83.5 ptssince 2013
from 88.1% in 2013
US average: 8.4%
Broadband at home
87.6%
+15.7 ptssince 2017
from 71.9% in 2017
US average: 91.0%
English only at home
96.7%
−0.1 ptssince 2016
from 96.8% in 2016
US average: 77.7%
Spanish at home
1.4%
−0.2 ptssince 2016
from 1.6% in 2016
US average: 13.6%
Drill deeper

Places similar to Williamson County

Adams County
Pop 64,267
Tehama County
Pop 64,665
Crawford County
Pop 62,657
Gordon County
Pop 61,701
Places similar to Williamson County
Head to head

Compare Williamson County to nearby counties

WILLIAMSON COUNTY VS
Franklin County
Income$56,740−14%
Home value$89,000−43%
Population36,916−45%
SEE FULL COMPARISON →
WILLIAMSON COUNTY VS
Johnson County
Income$62,528−5%
Home value$160,500+3%
Population13,363−80%
SEE FULL COMPARISON →
WILLIAMSON COUNTY VS
Saline County
Income$53,117−19%
Home value$94,300−40%
Population22,772−66%
SEE FULL COMPARISON →
WILLIAMSON COUNTY VS
Union County
Income$55,728−15%
Home value$131,700−16%
Population16,656−75%
SEE FULL COMPARISON →
Frequently asked

How many people live in Williamson County, Illinois?

Williamson County, Illinois has about 66,876 residents according to the 2024 American Community Survey.

What is the median household income in Williamson County, Illinois?

The typical household in Williamson County, Illinois earns about $65,604 a year. Half of households make more than that, and half make less.

Is Williamson County, Illinois expensive?

In Williamson County, Illinois, the median home is worth about $156,400, and the typical rent is about $930 a month.

How educated are people in Williamson County, Illinois?

About 26.2% of adults age 25 and over in Williamson County, Illinois hold a bachelor's degree or higher.

What is the poverty rate in Williamson County, Illinois?

About 13.8% of people in Williamson County, Illinois live below the federal poverty line.

Has Williamson County, Illinois grown since 1990?

Yes, Williamson County, Illinois has grown since 1990. The population has added about 9,143 residents, a change of about 16 percent over that period.

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Explore from here

18 census tracts
Census Tract 202.01Census Tract 214Census Tract 203Census Tract 213Census Tract 209Census Tract 207Census Tract 206Census Tract 208.02Census Tract 212Census Tract 205Census Tract 201Census Tract 204Census Tract 211Census Tract 202.02Census Tract 208.01Census Tract 210.01Census Tract 210.02Census Tract 210.03
12 ZIP codes
ZIP 62959ZIP 62948ZIP 62918ZIP 62951ZIP 62902ZIP 62922ZIP 62974ZIP 62933ZIP 62949ZIP 62915ZIP 62921ZIP 62841
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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