Overview
820,024
Total Population
38.2
Median age
49.59%
Female population %
101.7:100
Gender ratio (M:F)
30-34 years
Largest age group
48.1
Total dependency ratio
White
Largest racial group
88,58
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Snohomish County's population is young compared to the rest of the country:
- The median age in Snohomish County is 38.2, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Snohomish County's population under 18 was 22.64%, compared to the 22.51% nationwide.
- Snohomish County's elderly or the senior population (over 65 age) was 13.57% as compared to 16.04% nationwide.
- Of the total population in Snohomish County, 18.90% were under the age of 15, 18.25% aged 15 to 29, 49.29% aged 30 to 64, 12.07% aged 65 to 84, and 1.50% were 85 years of age and older.

Read more about Snohomish County, WA population by age ➔
Gender
There are 6,782 less females than males in Snohomish County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.59% females and 50.41% males in Snohomish County, WA.
- The Snohomish County, WA gender ratio is 101.7:100 i.e. 101.7 men to 100 women (1.017).
- For male population, the largest age group is 35-39 years with a population of 32,591.
- For the female population, the largest age group is 30-34 years with a population of 31,318.

Read more about Snohomish County, WA population by gender ➔
Race / Ethnicity
Snohomish County's population has become increasingly diverse:
- Racial distribution of Snohomish County population: 71.01% are White, 3.37% are Black or African American, 0.87% are American Indian and Alaska Native, 11.69% are Asian, 0.42% are Native Hawaiian and other Pacific Islander, 3.79% are some other race and 8.86% are multiracial.
- Snohomish County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
- By ethnicity, 88,58 is Hispanic or Latino (of any race), and 731,444 (89.20% of the total population) is Non-Hispanic.
- The largest racial group in Snohomish County is White with a population of 582,306 (71.01% of the total population).

Read more about Snohomish County, WA population by race ➔
Year by year
Snohomish County's population has not reached its peak yet and is showing a trend of further growth:
- The peak population was 840,079 in the year 2022
- From 2000 to 2010, Snohomish County's population increased by 106,429 (17.47%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Snohomish County's population increased by 114,347 (15.98%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, Snohomish County's population was lowest in year 2000 at 609,093.

Read more about Snohomish County, WA population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)