Williamson County, IL population age distributions
A complete breakdown of Williamson County's age demographics from 0 to 85 years, distributed across 18 age groups is listed in the table below.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 5 years | 3,774 | 5.62% |
| 5 to 9 years | 3,885 | 5.79% |
| 10 to 14 years | 4,346 | 6.47% |
| 15 to 19 years | 3,661 | 5.45% |
| 20 to 24 years | 3,487 | 5.2% |
| 25 to 29 years | 4,044 | 6.03% |
| 30 to 34 years | 4,500 | 6.7% |
| 35 to 39 years | 4,599 | 6.85% |
| 40 to 44 years | 4,300 | 6.41% |
| 45 to 49 years | 4,104 | 6.11% |
| 50 to 54 years | 4,363 | 6.5% |
| 55 to 59 years | 4,192 | 6.25% |
| 60 to 64 years | 4,945 | 7.37% |
| 65 to 69 years | 3,999 | 5.96% |
| 70 to 74 years | 3,537 | 5.27% |
| 75 to 79 years | 2,347 | 3.5% |
| 80 to 84 years | 1,591 | 2.37% |
| 85 years and over | 1,446 | 2.15% |
TABLE OF CONTENTS
Williamson County, IL population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Williamson County, IL population by age group.
The largest age group is 60 to 64 years with a population of 4,945 (7.37% of the total population).
The largest age group in Williamson County, IL was for the group of age 60 to 64 years with a population of 4,945 (7.37%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Williamson County, IL was the 85 years and over with a population of 1,446 (2.15%).
Williamson County, IL population by age cohort
To better understand the age distribution of Williamson County, IL's population, we divided it into the following 3 cohorts:
- Children : Under the age of 18 years
- Adults (working population): Between the age of 18 and 64 years
- Seniors: 65 years and above
FIGURE 2
Williamson County, IL population by age cohort
The largest age group was 18 to 64 years with a population of 39,726 (59.19% of the total population).
Williamson County, IL population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 14,474 | 21.56% |
| 18 to 64 years | 39,726 | 59.19% |
| 65 years and over | 12,920 | 19.25% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Williamson County 's population under 18 was 21.56%, compared to the 22.11% nationwide.
- Williamson County's working population (between 18 and 64) was 59.19%, compared to 61.36% nationwide.
- Williamson County's elderly or the senior population (over 65 age) was 19.25% as compared to 16.53% nationwide.
Williamson County, IL population pyramid
Population pyramid for Williamson County, IL is charted below using the estimates from U.S. Census Bureau's American Community Survey 5-Year estimates. A wide base suggests population increase, narrow base indicates declining birth rates.
Key stats from our analysis of the Williamson County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Williamson County, IL, is 28.5.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Williamson County, IL, is 30.6.
- Total dependency ratio for Williamson County, IL is 59.1.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Williamson County, IL is 3.3.
FIGURE 3
Williamson County, IL population pyramid
Williamson County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Williamson County, IL population pyramid
Here's the Williamson County, IL's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 1,990 | 1,784 | 3,774 |
| 5 to 9 years | 1,994 | 1,891 | 3,885 |
| 10 to 14 years | 2,234 | 2,112 | 4,346 |
| 15 to 19 years | 1,939 | 1,722 | 3,661 |
| 20 to 24 years | 1,722 | 1,765 | 3,487 |
| 25 to 29 years | 2,192 | 1,852 | 4,044 |
| 30 to 34 years | 2,355 | 2,145 | 4,500 |
| 35 to 39 years | 2,266 | 2,333 | 4,599 |
| 40 to 44 years | 2,333 | 1,967 | 4,300 |
| 45 to 49 years | 2,127 | 1,977 | 4,104 |
| 50 to 54 years | 2,276 | 2,087 | 4,363 |
| 55 to 59 years | 1,929 | 2,263 | 4,192 |
| 60 to 64 years | 2,628 | 2,317 | 4,945 |
| 65 to 69 years | 2,061 | 1,938 | 3,999 |
| 70 to 74 years | 1,512 | 2,025 | 3,537 |
| 75 to 79 years | 1,079 | 1,268 | 2,347 |
| 80 to 84 years | 634 | 957 | 1,591 |
| 85 years and over | 486 | 960 | 1,446 |
Things to know
What is the population of Williamson County, IL under 18?
Williamson County's population under the age of 18 is 14,474, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.56% of the total resident population of Williamson County, IL.
What is the aging population in Williamson County, IL?
Williamson County's population aged 65 years and above was 12,920. As per the U.S. Census Bureau's American Community Survey, this population is 19.25% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates