DeKalb County, IL population age distributions
A complete breakdown of DeKalb 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 | 5,568 | 5.53% |
| 5 to 9 years | 5,791 | 5.75% |
| 10 to 14 years | 6,540 | 6.5% |
| 15 to 19 years | 8,843 | 8.78% |
| 20 to 24 years | 14,115 | 14.02% |
| 25 to 29 years | 6,911 | 6.86% |
| 30 to 34 years | 6,349 | 6.31% |
| 35 to 39 years | 5,788 | 5.75% |
| 40 to 44 years | 5,671 | 5.63% |
| 45 to 49 years | 5,141 | 5.11% |
| 50 to 54 years | 5,453 | 5.42% |
| 55 to 59 years | 5,820 | 5.78% |
| 60 to 64 years | 5,137 | 5.1% |
| 65 to 69 years | 4,584 | 4.55% |
| 70 to 74 years | 3,434 | 3.41% |
| 75 to 79 years | 2,532 | 2.51% |
| 80 to 84 years | 1,422 | 1.41% |
| 85 years and over | 1,587 | 1.58% |
TABLE OF CONTENTS
DeKalb County, IL population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
DeKalb County, IL population by age group.
The largest age group is 20 to 24 years with a population of 14,115 (14.02% of the total population).
The largest age group in DeKalb County, IL was for the group of age 20 to 24 years with a population of 14,115 (14.02%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in DeKalb County, IL was the 80 to 84 years with a population of 1,422 (1.41%).
DeKalb County, IL population by age cohort
To better understand the age distribution of DeKalb 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
DeKalb County, IL population by age cohort
The largest age group was 18 to 64 years with a population of 65,496 (65.05% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- DeKalb County 's population under 18 was 21.48%, compared to the 22.11% nationwide.
- DeKalb County's working population (between 18 and 64) was 65.05%, compared to 61.36% nationwide.
- DeKalb County's elderly or the senior population (over 65 age) was 13.47% as compared to 16.53% nationwide.
DeKalb County, IL population pyramid
Population pyramid for DeKalb 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 DeKalb County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for DeKalb County, IL, is 25.9.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for DeKalb County, IL, is 19.6.
- Total dependency ratio for DeKalb County, IL is 45.4.
- Potential support ratio, which is the number of youth (working age population) per elderly, for DeKalb County, IL is 5.1.
FIGURE 3
DeKalb County, IL population pyramid
DeKalb County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
DeKalb County, IL population pyramid
Here's the DeKalb County, IL's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 2,834 | 2,734 | 5,568 |
| 5 to 9 years | 3,013 | 2,778 | 5,791 |
| 10 to 14 years | 3,225 | 3,315 | 6,540 |
| 15 to 19 years | 4,519 | 4,324 | 8,843 |
| 20 to 24 years | 7,197 | 6,918 | 14,115 |
| 25 to 29 years | 3,289 | 3,622 | 6,911 |
| 30 to 34 years | 3,327 | 3,022 | 6,349 |
| 35 to 39 years | 3,184 | 2,604 | 5,788 |
| 40 to 44 years | 2,597 | 3,074 | 5,671 |
| 45 to 49 years | 2,580 | 2,561 | 5,141 |
| 50 to 54 years | 2,765 | 2,688 | 5,453 |
| 55 to 59 years | 2,833 | 2,987 | 5,820 |
| 60 to 64 years | 2,613 | 2,524 | 5,137 |
| 65 to 69 years | 2,141 | 2,443 | 4,584 |
| 70 to 74 years | 1,673 | 1,761 | 3,434 |
| 75 to 79 years | 1,212 | 1,320 | 2,532 |
| 80 to 84 years | 527 | 895 | 1,422 |
| 85 years and over | 500 | 1,087 | 1,587 |
Things to know
What is the population of DeKalb County, IL under 18?
DeKalb County's population under the age of 18 is 21,631, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.48% of the total resident population of DeKalb County, IL.
What is the aging population in DeKalb County, IL?
DeKalb County's population aged 65 years and above was 13,559. As per the U.S. Census Bureau's American Community Survey, this population is 13.47% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates