Johnson County, Kansas Age & Gender Distribution (2024)
Population distribution by age and gender for Johnson County, Kansas
Johnson County, Kansas Age & Gender Statistics (2024)
Total Population
620,631
Median Age
38.6
Male Median
37.7
Female Median
39.4
Johnson County, Kansas Population Growth
Johnson County, Kansas Demographic Trend
Since 2010, the population of has changed by +16.8%%.
+16.8%% Growth
Johnson County, Kansas Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Johnson County, Kansas Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 38.6 | 620,631 |
| 2023 | 38.3 | 614,764 |
| 2022 | 38.1 | 610,742 |
| 2021 | 37.9 | 605,154 |
| 2020 | 37.8 | 597,574 |
| 2019 | 37.6 | 591,506 |
| 2018 | 37.5 | 585,502 |
| 2017 | 37.3 | 578,797 |
| 2016 | 37.1 | 572,428 |
| 2015 | 36.8 | 566,814 |
| 2014 | 36.6 | 560,025 |
| 2013 | 36.5 | 552,947 |
| 2012 | 36.4 | 546,046 |
| 2011 | 36.3 | 538,836 |
| 2010 | 36.1 | 531,228 |
Johnson County, Kansas Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.8% |
| 5–17 | 17.6% |
| 18–24 | 8.0% |
| 25–34 | 13.5% |
| 35–54 | 27.0% |
| 55–64 | 12.0% |
| 65+ | 16.0% |
Dependency Ratios for Johnson County, Kansas
- Total Dependency Ratio:
- 65.1
- Youth Dependency:
- 38.8
- Old-Age Dependency:
- 26.3
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Johnson County, Kansas
The median age in Johnson County, Kansas is 38.6 years.
According to latest Census data, the total population of Johnson County, Kansas is 620,631.
In Johnson County, Kansas, seniors (ages 65+) make up 16.0% of the population, while children under 18 represent 17.6%.
Based on historical data since 2010, the population in Johnson County, Kansas is aging.