Brookings County, SD population age distributions
A complete breakdown of Brookings 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 | 1,985 | 5.73% |
| 5 to 9 years | 2,257 | 6.52% |
| 10 to 14 years | 1,632 | 4.71% |
| 15 to 19 years | 4,081 | 11.78% |
| 20 to 24 years | 5,960 | 17.21% |
| 25 to 29 years | 2,508 | 7.24% |
| 30 to 34 years | 1,896 | 5.47% |
| 35 to 39 years | 2,165 | 6.25% |
| 40 to 44 years | 1,652 | 4.77% |
| 45 to 49 years | 1,442 | 4.16% |
| 50 to 54 years | 1,375 | 3.97% |
| 55 to 59 years | 1,668 | 4.82% |
| 60 to 64 years | 1,530 | 4.42% |
| 65 to 69 years | 1,502 | 4.34% |
| 70 to 74 years | 1,128 | 3.26% |
| 75 to 79 years | 840 | 2.43% |
| 80 to 84 years | 514 | 1.48% |
| 85 years and over | 496 | 1.43% |
TABLE OF CONTENTS
Brookings County, SD population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Brookings County, SD population by age group.
The largest age group is 20 to 24 years with a population of 5,960 (17.21% of the total population).
The largest age group in Brookings County, SD was for the group of age 20 to 24 years with a population of 5,960 (17.21%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Brookings County, SD was the 85 years and over with a population of 496 (1.43%).
Brookings County, SD population by age cohort
To better understand the age distribution of Brookings County, SD'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
Brookings County, SD population by age cohort
The largest age group was 18 to 64 years with a population of 23,041 (66.53% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Brookings County 's population under 18 was 20.53%, compared to the 22.11% nationwide.
- Brookings County's working population (between 18 and 64) was 66.53%, compared to 61.36% nationwide.
- Brookings County's elderly or the senior population (over 65 age) was 12.94% as compared to 16.53% nationwide.
Brookings County, SD population pyramid
Population pyramid for Brookings County, SD 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 Brookings County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Brookings County, SD, is 24.2.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Brookings County, SD, is 18.5.
- Total dependency ratio for Brookings County, SD is 42.6.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Brookings County, SD is 5.4.
FIGURE 3
Brookings County, SD population pyramid
Brookings County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Brookings County, SD population pyramid
Here's the Brookings County, SD's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 965 | 1,020 | 1,985 |
| 5 to 9 years | 1,123 | 1,134 | 2,257 |
| 10 to 14 years | 872 | 760 | 1,632 |
| 15 to 19 years | 1,969 | 2,112 | 4,081 |
| 20 to 24 years | 3,019 | 2,941 | 5,960 |
| 25 to 29 years | 1,598 | 910 | 2,508 |
| 30 to 34 years | 1,032 | 864 | 1,896 |
| 35 to 39 years | 1,205 | 960 | 2,165 |
| 40 to 44 years | 719 | 933 | 1,652 |
| 45 to 49 years | 776 | 666 | 1,442 |
| 50 to 54 years | 717 | 658 | 1,375 |
| 55 to 59 years | 806 | 862 | 1,668 |
| 60 to 64 years | 818 | 712 | 1,530 |
| 65 to 69 years | 777 | 725 | 1,502 |
| 70 to 74 years | 562 | 566 | 1,128 |
| 75 to 79 years | 318 | 522 | 840 |
| 80 to 84 years | 234 | 280 | 514 |
| 85 years and over | 233 | 263 | 496 |
Things to know
What is the population of Brookings County, SD under 18?
Brookings County's population under the age of 18 is 7,110, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 20.53% of the total resident population of Brookings County, SD.
What is the aging population in Brookings County, SD?
Brookings County's population aged 65 years and above was 4,480. As per the U.S. Census Bureau's American Community Survey, this population is 12.94% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates