Boulder County, Colorado Age & Gender Distribution (2024)
Population distribution by age and gender for Boulder County, Colorado
Boulder County, Colorado Age & Gender Statistics (2024)
Total Population
328,961
Median Age
37.7
Male Median
36.6
Female Median
39.0
Boulder County, Colorado Population Growth
Boulder County, Colorado Demographic Trend
Since 2010, the population of has changed by +13.4%%.
+13.4%% Growth
Boulder County, Colorado Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Boulder County, Colorado Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 37.7 | 328,961 |
| 2023 | 37.5 | 328,317 |
| 2022 | 37.0 | 328,658 |
| 2021 | 37.2 | 328,713 |
| 2020 | 36.9 | 324,682 |
| 2019 | 36.6 | 322,510 |
| 2018 | 36.2 | 321,030 |
| 2017 | 36.2 | 316,782 |
| 2016 | 36.0 | 313,961 |
| 2015 | 35.8 | 310,032 |
| 2014 | 35.7 | 305,166 |
| 2013 | 35.7 | 301,072 |
| 2012 | 35.6 | 297,218 |
| 2011 | 35.5 | 293,205 |
| 2010 | 35.3 | 290,177 |
Boulder County, Colorado Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 3.9% |
| 5–17 | 13.7% |
| 18–24 | 15.4% |
| 25–34 | 13.6% |
| 35–54 | 25.1% |
| 55–64 | 12.0% |
| 65+ | 16.4% |
Dependency Ratios for Boulder County, Colorado
- Total Dependency Ratio:
- 51.4
- Youth Dependency:
- 26.6
- Old-Age Dependency:
- 24.8
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Boulder County, Colorado
The median age in Boulder County, Colorado is 37.7 years.
According to latest Census data, the total population of Boulder County, Colorado is 328,961.
In Boulder County, Colorado, seniors (ages 65+) make up 16.4% of the population, while children under 18 represent 13.7%.
Based on historical data since 2010, the population in Boulder County, Colorado is aging.