COUNTY · 2000 CENSUS

Williamson County

Illinois · 61,296 residents · 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 $31,991. Population has held roughly steady since 1990. Median home value has risen by half since 1990, reaching $61,200. Households here earn about 31% less than the Illinois median.

At a glance

Lower income

below the US median

US median: $42,589

Older

median age 38.8

US median: 35.2

Less educated

17% hold a bachelor's degree

US average: 24%

Stable housing

home values roughly flat, inflation adjusted

US median home: $120,530

Section 01

Population & growth

Total population

61,296

+6%since 1990

from 57,733 in 1990

1990 – 2025

Population density

146 / sq mi

+6%since 1990

from 137 / sq mi in 1990

US average: 242

Median age

38.8

+7%since 1990

from 36.1 in 1990

US average: 35.2

Population, 1990 – 2024

202467K

Section 02

Income & economy

Median household income

$31,991

+10%inflation adjusted, since 1990

from $22,043 in 1990

US average: $42,589

1990 – 2024

Per capita income

$17,779

+58%since 1990

from $11,254 in 1990

US average: $21,522

Poverty rate

14.6%

−1.2 ptssince 1990

from 15.8% in 1990

US average: 12.4%

Section 03

Housing

Median home value

$61,200

+16%inflation adjusted, since 1990

from $40,200 in 1990

US average: $120,530

1990 – 2024

Median gross rent

$400

+1%inflation adjusted, since 1990

from $300 in 1990

US average: $602

Owner-occupied

73.6%

−0.1 ptssince 1990

from 73.7% in 1990

26.4% rent

Afford Score

1.9

+5%since 1990

from 1.8 in 1990

1990 – 2024

RELATED:See current rent listings in Williamson County on RentDataNow

Section 04

Race & ethnicity

1990

White, non-Hispanic97.1%(56,051)

Black1.9%(1,113)

Hispanic / Latino0.6%(367)

Asian0.6%(347)

Diversity Score8.6%(4,967)

2000

White, non-Hispanic94.6%(58,006)

Black2.4%(1,498)

Hispanic / Latino1.2%(763)

Asian0.5%(304)

Diversity Score10.3%(6,291)

Diversity Score

+19%since 1990

from 9 in 1990

1990 – 2024

Section 05

Education

Bachelor's degree or higher

17.2%

+2.9 ptssince 1990

from 14.2% in 1990

US average: 24.4%

High school or higher

79.8%

+8.0 ptssince 1990

from 71.8% in 1990

US average: 80.3%

Graduate degree

6.1%

+1.1 ptssince 1990

from 5.0% in 1990

US average: 8.8%

Section 06

Commute & transportation

Average commute

14.5 min

−24%since 1990

from 19.0 min in 1990

US average: 17.6

Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Drill deeper

Places similar to Williamson County

Head to head

Compare Williamson County to nearby counties

WILLIAMSON COUNTY VS

Franklin County

Income$56,740+77%

Home value$89,000+45%

Population36,916−45%

SEE FULL COMPARISON →

WILLIAMSON COUNTY VS

Johnson County

Income$62,528+95%

Home value$160,500+162%

Population13,363−80%

SEE FULL COMPARISON →

WILLIAMSON COUNTY VS

Saline County

Income$53,117+66%

Home value$94,300+54%

Population22,772−66%

SEE FULL COMPARISON →

WILLIAMSON COUNTY VS

Union County

Income$55,728+74%

Home value$131,700+115%

Population16,656−75%

SEE FULL COMPARISON →

Frequently asked

How many people live in Williamson County, Illinois?

Williamson County, Illinois has about 61,296 residents according to the 2000 Census.

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

The typical household in Williamson County, Illinois earns about $31,991 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 $61,200, and the typical rent is about $400 a month.

How educated are people in Williamson County, Illinois?

About 17.2% 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 14.6% 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 3,563 residents, a change of about 6 percent over that period.

DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →

Williamson County

Population & growth

Income & economy

Housing

Race & ethnicity

Education

Commute & transportation

Work & employment

People & community

Places similar to Williamson County

Compare Williamson County to nearby counties

How many people live in Williamson County, Illinois?

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

Is Williamson County, Illinois expensive?

How educated are people in Williamson County, Illinois?

What is the poverty rate in Williamson County, Illinois?

Has Williamson County, Illinois grown since 1990?

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