Jasper County, Iowa Age & Gender Distribution (2024)
Population distribution by age and gender for Jasper County, Iowa
Jasper County, Iowa Age & Gender Statistics (2024)
Total Population
37,954
Median Age
41.3
Male Median
39.9
Female Median
43.0
Jasper County, Iowa Population Growth

Jasper County, Iowa Demographic Trend
Since 2010, the population of has changed by +2.4%%.
+2.4%% Growth
Jasper County, Iowa Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Jasper County, Iowa Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 41.3 | 37,954 |
| 2023 | 41.4 | 37,864 |
| 2022 | 41.0 | 37,808 |
| 2021 | 40.9 | 37,686 |
| 2020 | 41.8 | 37,032 |
| 2019 | 42.1 | 36,971 |
| 2018 | 42.3 | 36,891 |
| 2017 | 42.6 | 36,789 |
| 2016 | 42.6 | 36,715 |
| 2015 | 42.2 | 36,726 |
| 2014 | 42.0 | 36,715 |
| 2013 | 42.1 | 36,710 |
| 2012 | 41.7 | 36,823 |
| 2011 | 41.7 | 36,902 |
| 2010 | 41.4 | 37,050 |
Jasper County, Iowa Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.2% |
| 5–17 | 16.9% |
| 18–24 | 7.6% |
| 25–34 | 11.7% |
| 35–54 | 25.5% |
| 55–64 | 13.5% |
| 65+ | 19.8% |
Dependency Ratios for Jasper County, Iowa
- Total Dependency Ratio:
- 71.8
- Youth Dependency:
- 37.8
- Old-Age Dependency:
- 33.9
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Jasper County, Iowa
The median age in Jasper County, Iowa is 41.3 years.
According to latest Census data, the total population of Jasper County, Iowa is 37,954.
In Jasper County, Iowa, seniors (ages 65+) make up 19.8% of the population, while children under 18 represent 16.9%.
Based on historical data since 2010, the population in Jasper County, Iowa has remained stable.