Dallas County, Iowa Age & Gender Distribution (2024)
Population distribution by age and gender for Dallas County, Iowa
Dallas County, Iowa Age & Gender Statistics (2024)
Total Population
107,968
Median Age
36.1
Male Median
35.5
Female Median
36.7
Dallas County, Iowa Population Growth

Dallas County, Iowa Demographic Trend
Since 2010, the population of has changed by +74.9%%.
+74.9%% Growth
Dallas County, Iowa Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Dallas County, Iowa Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 36.1 | 107,968 |
| 2023 | 35.8 | 104,136 |
| 2022 | 35.6 | 100,367 |
| 2021 | 35.5 | 96,604 |
| 2020 | 35.4 | 90,418 |
| 2019 | 35.4 | 87,099 |
| 2018 | 35.3 | 84,002 |
| 2017 | 35.1 | 80,864 |
| 2016 | 35.0 | 78,074 |
| 2015 | 34.7 | 74,892 |
| 2014 | 34.6 | 72,124 |
| 2013 | 34.4 | 69,526 |
| 2012 | 34.3 | 66,997 |
| 2011 | 34.2 | 64,383 |
| 2010 | 34.3 | 61,714 |
Dallas County, Iowa Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.7% |
| 5–17 | 19.8% |
| 18–24 | 7.5% |
| 25–34 | 14.0% |
| 35–54 | 29.0% |
| 55–64 | 10.2% |
| 65+ | 12.9% |
Dependency Ratios for Dallas County, Iowa
- Total Dependency Ratio:
- 65.1
- Youth Dependency:
- 43.8
- Old-Age Dependency:
- 21.2
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Dallas County, Iowa
The median age in Dallas County, Iowa is 36.1 years.
According to latest Census data, the total population of Dallas County, Iowa is 107,968.
In Dallas County, Iowa, seniors (ages 65+) make up 12.9% of the population, while children under 18 represent 19.8%.
Based on historical data since 2010, the population in Dallas County, Iowa is aging.