Buchanan County, Iowa Age & Gender Distribution (2024)
Population distribution by age and gender for Buchanan County, Iowa
Buchanan County, Iowa Age & Gender Statistics (2024)
Total Population
20,694
Median Age
40.3
Male Median
39.0
Female Median
41.5
Buchanan County, Iowa Population Growth
Buchanan County, Iowa Demographic Trend
Since 2010, the population of has changed by -1.6%%.
-1.6%% Growth
Buchanan County, Iowa Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Buchanan County, Iowa Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 40.3 | 20,694 |
| 2023 | 39.9 | 20,645 |
| 2022 | 39.5 | 20,631 |
| 2021 | 39.2 | 20,598 |
| 2020 | 39.0 | 21,141 |
| 2019 | 39.1 | 21,118 |
| 2018 | 38.7 | 21,125 |
| 2017 | 38.7 | 21,101 |
| 2016 | 38.5 | 21,031 |
| 2015 | 38.4 | 20,998 |
| 2014 | 38.8 | 20,947 |
| 2013 | 39.1 | 20,954 |
| 2012 | 38.9 | 20,988 |
| 2011 | 38.8 | 21,022 |
| 2010 | 38.4 | 21,026 |
Buchanan County, Iowa Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.4% |
| 5–17 | 18.9% |
| 18–24 | 7.2% |
| 25–34 | 10.8% |
| 35–54 | 24.1% |
| 55–64 | 13.8% |
| 65+ | 18.6% |
Dependency Ratios for Buchanan County, Iowa
- Total Dependency Ratio:
- 78.6
- Youth Dependency:
- 45.3
- Old-Age Dependency:
- 33.3
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Buchanan County, Iowa
The median age in Buchanan County, Iowa is 40.3 years.
According to latest Census data, the total population of Buchanan County, Iowa is 20,694.
In Buchanan County, Iowa, seniors (ages 65+) make up 18.6% of the population, while children under 18 represent 18.9%.
Based on historical data since 2010, the population in Buchanan County, Iowa is aging.