Polk County, Iowa Age & Gender Distribution (2024)
Population distribution by age and gender for Polk County, Iowa
Polk County, Iowa Age & Gender Statistics (2024)
Total Population
503,175
Median Age
36.2
Male Median
35.6
Female Median
36.8
Polk County, Iowa Population Growth
Polk County, Iowa Demographic Trend
Since 2010, the population of has changed by +20.0%%.
+20.0%% Growth
Polk County, Iowa Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Polk County, Iowa Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 36.2 | 503,175 |
| 2023 | 36.2 | 497,441 |
| 2022 | 36.1 | 493,378 |
| 2021 | 35.9 | 488,871 |
| 2020 | 35.7 | 485,418 |
| 2019 | 35.5 | 479,612 |
| 2018 | 35.3 | 474,274 |
| 2017 | 35.2 | 467,235 |
| 2016 | 35.0 | 459,159 |
| 2015 | 35.0 | 452,369 |
| 2014 | 34.9 | 445,136 |
| 2013 | 34.8 | 438,307 |
| 2012 | 34.7 | 431,811 |
| 2011 | 34.8 | 425,582 |
| 2010 | 34.8 | 419,301 |
Polk County, Iowa Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.5% |
| 5–17 | 17.9% |
| 18–24 | 8.8% |
| 25–34 | 15.2% |
| 35–54 | 26.2% |
| 55–64 | 11.5% |
| 65+ | 14.0% |
Dependency Ratios for Polk County, Iowa
- Total Dependency Ratio:
- 62.2
- Youth Dependency:
- 39.5
- Old-Age Dependency:
- 22.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Polk County, Iowa
The median age in Polk County, Iowa is 36.2 years.
According to latest Census data, the total population of Polk County, Iowa is 503,175.
In Polk County, Iowa, seniors (ages 65+) make up 14.0% of the population, while children under 18 represent 17.9%.
Based on historical data since 2010, the population in Polk County, Iowa has remained stable.