Williamson County, Illinois Population 2024

66,199

Williamson County, Illinois's estimated 2024 population is 66,199 with a growth rate of -0.37% in the past year according to the most recent United States census data. Williamson County, Illinois is the 22nd largest county in Illinois. The 2010 population was 66,440 and has seen a growth of -0.36% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202964,959-248-0.38%
202865,207-248-0.38%
202765,455-248-0.38%
202665,703-248-0.38%
202565,951-248-0.37%
202466,199-248-0.37%
202366,447-248-0.37%
202266,695-248-0.37%
202166,943-170-0.25%
202067,1134800.72%
201966,633-384-0.57%
201867,017-59-0.09%
201767,076-428-0.63%
201667,504470.07%
201567,457180.03%
201467,439-33-0.05%
201367,4726791.02%
201266,793480.07%
201166,7453050.46%
201066,440
199057,7331,1952.11%
198056,5387,51715.33%
197049,0212,9046.3%
196046,117-2,504-5.15%
195048,621-2,803-5.45%
194051,424-2,456-4.56%
193053,880-7,212-11.81%
192061,09215,99435.46%
191045,09817,30262.25%
190027,7965,57025.06%
189022,2262,90215.02%
188019,3241,99511.51%
187017,3295,12441.98%
186012,2054,98969.14%
18507,2162,75961.9%
18404,457-60,502-93.14%
showing: 36 rows
2024 Growth Rate
-0.37% (-248)
County Website
Williamson County
County Seat
2010 Population
66,440
Area
420 mi²
Density
158 people/mi²
Growth Since 2010
-0.36% (-241)
Founded
1839

Williamson County, Illinois Population 2024

Population by Race

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Race
Population
Percentage (of total)
White60,00589.4%
Two or more races3,0104.48%
Black or African American2,2183.3%
Asian1,0341.54%
Other race5310.79%
Native American3220.48%
Native Hawaiian or Pacific Islander
showing: 7 rows

White

Two or more races

Black or African American

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Williamson County, Illinois Population by Race

Williamson County, Illinois Population Pyramid 2024

Williamson County, Illinois Median Age

41.2

Total

40.4

Male

42

Female

Williamson County, Illinois Adults

There are 52,646 adults, (12,920 of whom are seniors) in Williamson County, Illinois.

Williamson County, Illinois Age Dependency

69

Age Dependency Ratio

32.5

Old Age Dependency Ratio

36.4

Child Dependency Ratio

Williamson County, Illinois Sex Ratio

Female33,36349.71%
Male33,75750.29%

Williamson County, Illinois Population by Age

Williamson County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All28,5212.287129
Married13,2492.9189.410.6
Non Family10,6791.2154.645.4
Female2,7823.0252.847.2
Male1,8112.959.940.1
showing: 5 rows

2.84

Average Family Size

2.28

Average Household Size

71.0%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Williamson County, Illinois Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Williamson County, Illinois Educational Attainment by Sex (over 25)

Williamson County, Illinois Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among 2+ races people with a rate of 94.81%.

The highest rate of bachelors degrees is among asian people with a rate of 48.78%.

Williamson County, Illinois Educational Attainment by Race

All

Male

Female

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$44,263

Average Earnings

$50,302

Average Male

$38,804

Average Female

Williamson County, Illinois Earnings by Educational Attainment

Williamson County, Illinois Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Williamson County, Illinois Language

96.34% of Williamson County, Illinois residents speak only English, while 3.66% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.63% of the population.

Williamson County, Illinois Language

Williamson County, Illinois Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White57,8146,79011.74%
Multiple2,95572324.47%
Black1,71671241.49%
Hispanic1,75133819.3%
Asian1,03412812.38%
Native2545421.26%
Other496173.43%
showing: 7 rows

13.2%

Overall Poverty Rate

12.12%

Male Poverty Rate

14.25%

Female Poverty Rate

Poverty in Williamson County, Illinois

The race most likely to be in poverty in Williamson County, Illinois is Black, with 41.49% below the poverty level.

The race least likely to be in poverty in Williamson County, Illinois is Other, with 3.43% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.03%. Among those working part-time, it was 16.84%, and for those that did not work, the poverty rate was 19.69%.

Williamson County, Illinois Poverty

rate

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Rate
Poverty
Less Than 9th Grade28.82%
High School15.68%
Some College9.79%
Bachelors or Greater4.06%
showing: 4 rows

Williamson County, Illinois Poverty Rate by Education

rate

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Rate
Poverty
Male Unemployed42.46%
Female Unemployed24.92%
Female Employed6.95%
Male Employed6.4%
showing: 4 rows

Williamson County, Illinois Poverty Rate by Employment Status and Sex

Williamson County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Williamson County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

50.2%

Overall Marriage Rate

49.7%

Male Marriage Rate

50.6%

Female Marriage Rate

Williamson County, Illinois Married by Age and Sex

male

female

Williamson County, Illinois Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

Williamson County, Illinois Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Williamson County, Illinois Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

4,893

Number of Veterans

4,462

Male Veterans

431

Female Veterans

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Williamson County, Illinois Veterans by War

count

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Williamson County, Illinois Veterans by Age

count

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Williamson County, Illinois Veterans by Race

Williamson County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

7.91%

Veteran Poverty Rate

41.81%

Veteran Disability Rate

Williamson County, Illinois Veterans by Education

LaborForceParticipation

58.7%

Labor Force Participation

55.9%

Employment Rate

4.4%

Unemployment Rate

Williamson County, Illinois Employment by Age

LaborForceParticipation

Williamson County, Illinois Employment by Race

LaborForceParticipation

Williamson County, Illinois Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

76.2%

Born in Williamson County, Illinois

97.79%

Native Born

2.21%

Foreign Born

1.24%

Non Citizen

0.97%

Naturalized

Place of Birth

97.79% of Williamson County, Illinois residents were born in the United States, with 76.2% having been born in Illinois. 1.24% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Williamson County, Illinois Place of Birth

Sources