Where does this demographic data come from?

All demographic data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates, which samples about 3.5 million households annually. The 5-year estimates provide the most reliable data for small geographies like municipalities.

What is the difference between Census data and ACS data?

The decennial Census (conducted every 10 years) is a full population count focusing on basic demographics. The ACS is an ongoing survey that collects detailed data on income, education, housing, commute patterns, and more. ACS data is updated annually but represents averages over a 5-year period.

How accurate is this data for small towns?

For smaller municipalities, ACS estimates have wider margins of error because fewer residents are sampled. The 5-year estimates reduce this uncertainty by averaging over a longer period. For towns under 5,000 people, treat specific numbers as approximations rather than precise counts.

Williamson, IL Population, Income & Demographics 2026

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Demographics — 2024 ACS 5-Year Estimatesi

Census

Populationi

160

Median Agei

Race & Ethnicityi

White

89.4%143

Two or More

5.6%9

Hispanic/Latino

5%8

Educational Attainment (Age 25+)i

GED/Alternative

11.3%14

High School Diploma

22.6%28

Some College (<1 yr)

7.3%9

Some College (1+ yr)

13.7%17

Associate's Degree

15.3%19

Bachelor's Degree

5.6%7

HS or Higher

75.8%

BA or Higher

5.6%

Housingi

Median Home Valuei

$75,800

Median Renti

$863

Tenure

Owner-Occupied

67.9%55

Renter-Occupied

32.1%26

Total Units

Homeownership

67.9%

Vacancy Rate

17.3%

Home Values

Under $50K

34.5%19

$50K–$100K

40%22

$100K–$150K

7.3%4

$150K–$200K

5.5%3

$300K–$500K

5.5%3

$500K–$1M

3.6%2

$1M+

3.6%2

Rent Distribution

$500–$750

$750–$1,000

$1,000–$1,250

Year Built

2000–2009

2%2

1990–1999

9.2%9

1980–1989

10.2%10

1970–1979

6.1%6

1960–1969

3.1%3

1950–1959

12.2%12

1940–1949

14.3%14

1939 or earlier

42.9%42

Heating Fuel

Utility Gas

79%64

Electricity

14.8%12

Bottled/LP Gas

6.2%5

Economyi

Median Household Incomei

$57,841

Mean Household Incomei

$63,896

Per Capita Incomei

$32,692

Poverty Ratei

18.8%

Unemploymenti

Labor Forcei

Household Income Distribution

Under $10K

7.4%6

$10K–$15K

18.5%15

$30K–$35K

3.7%3

$35K–$40K

3.7%3

$40K–$45K

3.7%3

$45K–$50K

8.6%7

$50K–$60K

16%13

$60K–$75K

11.1%9

$75K–$100K

6.2%5

$100K–$125K

4.9%4

$125K–$150K

7.4%6

$150K–$200K

8.6%7

Ancestry & Heritage

Self-reported ancestry groups. Residents may report multiple ancestries, so totals may exceed 100%.

Foreign-Born Populationi

Foreign-Borni

10.6%

By Region

Commute & Transportationi

Workersi

Avg. Commutei

30.5 min

How People Get to Work

Travel Time to Work

Workforce

Total Employed

Occupations

Industries

Social Characteristicsi

Marital Status (15+)i

Veteransi

18(13% of civilian adults)

Health Insurancei

98.8%Insured

1.2%Uninsured