Snohomish County, Washington Age & Gender Distribution (2024)
Population distribution by age and gender for Snohomish County, Washington
Snohomish County, Washington Age & Gender Statistics (2024)
Total Population
844,430
Median Age
38.6
Male Median
38.0
Female Median
39.1
Snohomish County, Washington Population Growth

Snohomish County, Washington Demographic Trend
Since 2010, the population of has changed by +21.6%%.
+21.6%% Growth
Snohomish County, Washington Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Snohomish County, Washington Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 38.6 | 844,430 |
| 2023 | 38.4 | 834,648 |
| 2022 | 38.3 | 828,337 |
| 2021 | 38.2 | 820,024 |
| 2020 | 38.0 | 811,572 |
| 2019 | 38.0 | 798,808 |
| 2018 | 37.8 | 786,620 |
| 2017 | 37.8 | 771,904 |
| 2016 | 37.8 | 758,649 |
| 2015 | 37.6 | 746,653 |
| 2014 | 37.5 | 735,351 |
| 2013 | 37.3 | 724,627 |
| 2012 | 37.2 | 714,443 |
| 2011 | 36.9 | 704,536 |
| 2010 | 36.7 | 694,219 |
Snohomish County, Washington Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.0% |
| 5–17 | 16.1% |
| 18–24 | 7.2% |
| 25–34 | 14.9% |
| 35–54 | 28.4% |
| 55–64 | 12.6% |
| 65+ | 14.8% |
Dependency Ratios for Snohomish County, Washington
- Total Dependency Ratio:
- 58.5
- Youth Dependency:
- 35.1
- Old-Age Dependency:
- 23.4
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Snohomish County, Washington
The median age in Snohomish County, Washington is 38.6 years.
According to latest Census data, the total population of Snohomish County, Washington is 844,430.
In Snohomish County, Washington, seniors (ages 65+) make up 14.8% of the population, while children under 18 represent 16.1%.
Based on historical data since 2010, the population in Snohomish County, Washington is aging.