Williamson County, IL Population

Overview

67,271

Total Population

41.1

Median age

49.90%

Female population %

100.4:100

Gender ratio (M:F)

60-64 years

Largest age group

59.3

Total dependency ratio

White

Largest racial group

1,858

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Williamson County's population is old compared to the rest of the country:

The median age in Williamson County is 41.1, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Williamson County's population under 18 was 21.96%, compared to the 22.51% nationwide.
Williamson County's elderly or the senior population (over 65 age) was 18.84% as compared to 16.04% nationwide.
Of the total population in Williamson County, 18.37% were under the age of 15, 16.59% aged 15 to 29, 46.20% aged 30 to 64, 16.77% aged 65 to 84, and 2.07% were 85 years of age and older.

There are 129 less females than males in Williamson County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.90% females and 50.10% males in Williamson County, IL.
The Williamson County, IL gender ratio is 100.4:100 i.e. 100.4 men to 100 women (1.004).
For male population, the largest age group is 60-64 years with a population of 2,552.
For the female population, the largest age group is 55-59 years with a population of 2,437.

Williamson County's population has become increasingly diverse:

Racial distribution of Williamson County population: 90.09% are White, 4.04% are Black or African American, 0.22% are American Indian and Alaska Native, 1.32% are Asian, 1% are some other race and 3.32% are multiracial.
Williamson County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 1,858 is Hispanic or Latino (of any race), and 65,413 (97.24% of the total population) is Non-Hispanic.
The largest racial group in Williamson County is White with a population of 60,606 (90.09% of the total population).

Williamson County's population has already reached its peak and is showing a trend of decline:

The peak population was 67,504 in the year 2016
From 2000 to 2010, Williamson County's population increased by 5,160 (8.42%), as compared to the national growth of 9.63%.
From 2010 to 2020, Williamson County's population increased by 673 (1.01%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Williamson County's population was lowest in year 2000 at 61,280.