Oak Brook, IL population age distributions
A complete breakdown of Oak Brook'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 | 317 | 3.95% |
| 5 to 9 years | 466 | 5.8% |
| 10 to 14 years | 655 | 8.16% |
| 15 to 19 years | 413 | 5.14% |
| 20 to 24 years | 440 | 5.48% |
| 25 to 29 years | 176 | 2.19% |
| 30 to 34 years | 189 | 2.35% |
| 35 to 39 years | 381 | 4.75% |
| 40 to 44 years | 530 | 6.6% |
| 45 to 49 years | 320 | 3.99% |
| 50 to 54 years | 532 | 6.63% |
| 55 to 59 years | 833 | 10.38% |
| 60 to 64 years | 350 | 4.36% |
| 65 to 69 years | 473 | 5.89% |
| 70 to 74 years | 658 | 8.2% |
| 75 to 79 years | 480 | 5.98% |
| 80 to 84 years | 506 | 6.3% |
| 85 years and over | 309 | 3.85% |
TABLE OF CONTENTS
Oak Brook, IL population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2019-2023
FIGURE 1
Oak Brook, IL population by age group.
The largest age group is 55 to 59 years with a population of 833 (10.38% of the total population).
The largest age group in Oak Brook, IL was for the group of age 55 to 59 years with a population of 833 (10.38%), according to the 2019-2023 American Community Survey.
At the same time, the smallest age group in Oak Brook, IL was the 25 to 29 years with a population of 176 (2.19%).
Oak Brook, IL population by age cohort
To better understand the age distribution of Oak Brook, 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
Oak Brook, IL population by age cohort
The largest age group was 18 to 64 years with a population of 3,872 (48.23% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Oak Brook 's population under 18 was 21.55%, compared to the 22.16% nationwide.
- Oak Brook's working population (between 18 and 64) was 48.23%, compared to 61% nationwide.
- Oak Brook's elderly or the senior population (over 65 age) was 30.22% as compared to 16.84% nationwide.
Oak Brook, IL population pyramid
Population pyramid for Oak Brook, 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 Oak Brook's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Oak Brook, IL, is 34.5.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Oak Brook, IL, is 58.3.
- Total dependency ratio for Oak Brook, IL is 92.8.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Oak Brook, IL is 1.7.
FIGURE 3
Oak Brook, IL population pyramid
Oak Brook population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Oak Brook, IL population pyramid
Here's the Oak Brook, IL's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 137 | 180 | 317 |
| 5 to 9 years | 241 | 225 | 466 |
| 10 to 14 years | 132 | 523 | 655 |
| 15 to 19 years | 165 | 248 | 413 |
| 20 to 24 years | 273 | 167 | 440 |
| 25 to 29 years | 70 | 106 | 176 |
| 30 to 34 years | 127 | 62 | 189 |
| 35 to 39 years | 178 | 203 | 381 |
| 40 to 44 years | 221 | 309 | 530 |
| 45 to 49 years | 114 | 206 | 320 |
| 50 to 54 years | 244 | 288 | 532 |
| 55 to 59 years | 540 | 293 | 833 |
| 60 to 64 years | 138 | 212 | 350 |
| 65 to 69 years | 169 | 304 | 473 |
| 70 to 74 years | 385 | 273 | 658 |
| 75 to 79 years | 273 | 207 | 480 |
| 80 to 84 years | 226 | 280 | 506 |
| 85 years and over | 105 | 204 | 309 |
Things to know
What is the population of Oak Brook, IL under 18?
Oak Brook's population under the age of 18 is 1,730, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.55% of the total resident population of Oak Brook, IL.
What is the aging population in Oak Brook, IL?
Oak Brook's population aged 65 years and above was 2,426. As per the U.S. Census Bureau's American Community Survey, this population is 30.22% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates