Snohomish County, Washington Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Snohomish County, WA Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A
Health Above averageHealthier than 82% of counties in Washington
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B
Income Around averageAmong the top 3 wealthiest counties in Washington
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B
Education Around averageBetter educated than 79% of counties in Washington
Source: Map AI Methodology
Population: density and quick facts
| Metric | Snohomish County | Washington Avg | U.S. Average |
|---|---|---|---|
| Population | 843,136 | 7,801,159 | 337,468,954 |
| Population density (per sq mi) | 384.2 | 109.3 | 86.4 |
| Population growth (%/yr) | 1.02% | 1.21% | 0.59% |
| Median age | 36.5 | 36.2 | 37.3 |
| Households | 315,741 | 3,058,619 | 130,235,071 |
Population in Snohomish County grew by 20.4% from 2009 to 2024, reaching 843,136 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Snohomish County is Millennials, aged 29–44, at 24.8% of residents. That is 1.4 points above Washington as a whole.
- Gen Z 13–28 166,192 19.7% -1.7 pts
- Millennials 29–44 208,875 24.8% +1.4 pts
- Gen X 45–60 173,393 20.6% +1.1 pts
- Boomers 61–79 127,093 15.1% -1.2 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Washington, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 49.8% of the people living in Snohomish County and men 50.2%.
- Women 49.8% Washington 49.7%
- Men 50.2% Washington 50.3%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Snohomish County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Snohomish County has a the economy index of B, which means it is quite prosperous.
| Metric | Snohomish County | Washington Avg | U.S. Average |
|---|---|---|---|
| Median household income | $111,921 | $98,224 | $80,455 |
| Income growth (%/yr) | 5.29% | 5.64% | 4.80% |
| Unemployment rate | 4.4% | 5.0% | 5.2% |
The median household income in Snohomish County is about 14% higher than in Washington.
Housing
| Metric | Snohomish County | Washington Avg | U.S. Average |
|---|---|---|---|
| Median home price | $550,004 | $485,016 | $248,835 |
| Median rent | $1,948 | $1,759 | $1,407 |
| Homeownership rate | 68.2% | 63.8% | 65.2% |
The median home price in Snohomish County is about 23.5 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,948 per month for that long.
Commute Time & Mobility
Commuters in Snohomish County spend about 57 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 235 hours, about 9.8 full days, spent commuting.
| Metric | Snohomish County | Washington Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 28.3 | 22.4 | 22.4 |
| Round-trip commute (min) | 56.5 | 44.8 | 44.8 |
| Yearly time spent (hours) | 235 | 187 | 187 |
| Estimated yearly cost | $7,299 | $5,785 | $5,790 |
| Work from home | 20.0% | 19.8% | 15.0% |
| Highway traffic (vehicles/day) | 17,470 | 10,119 | 8,813 |
| Local road traffic (vehicles/day) | 2,492 | 1,525 | 1,355 |
Fastest commutes among counties in
Washington:
Walla Walla County (12.2 min), San Juan County (12.3 min), Asotin County (13.2 min).
Slowest:
Mason County (32.0 min), Garfield County (28.4 min), Snohomish County (28.3 min).
The average commute time in Snohomish County is 28 minutes, longer than the 22 minutes in Washington.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Snohomish County has a education index of B, which means it is quite educated.
| Metric | Snohomish County | Washington Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 33.1% | 35.1% | 31.6% |
| Average household size | 2.63 | 2.50 | 2.53 |
Highest education index among counties in
Washington:
King County (0.4), San Juan County (0.4), Jefferson County (0.4).
Lowest:
Adams County (0.2), Yakima County (0.2), Grant County (0.2).
Health
Snohomish County has a health index of A, which means it is very healthy.
| Metric | Snohomish County | Washington Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.6 | 79.6 | 78.3 |
| Self-rated poor health | 12.3% | 15.4% | 16.3% |
| Smokers | 14.4% | 16.4% | 19.0% |
Highest health index among counties in
Washington:
King County (0.8), Whitman County (0.8), San Juan County (0.8).
Lowest:
Adams County (0.8), Okanogan County (0.8), Pacific County (0.8).
Snohomish County, WA Compared With Nearby Counties
Snohomish County, WA is the 2nd largest of the 6 counties compared here, 843,136 residents against a local median of 230,493. The measure that sets Snohomish County, WA apart most is commute: 28.3 min, 34% above the local median of 21.1 min. That is the weaker end of the local range on this measure.
Median household income tells the same story from another angle: $111,921 against a local median of $92,129, 21% above it. The picture is mixed rather than uniform: median household income runs ahead of the neighbourhood while commute runs behind it, so Snohomish County, WA is trading one against the other rather than simply out-performing what surrounds it. The counties themselves spread 8.0 min on commute, so Snohomish County, WA sits at one end of an already wide local range rather than apart from it. Snohomish County, WA has the 6th lowest commute of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Snohomish County, WA | 843,136 | $111,921 #2/6 | $550,004 #4/6 | 28.3 min #6/6 |
| Skagit County, WA | 131,328 | $88,887 | $412,493 | 21.1 min |
| King County, WA | 2,275,758 | $124,760 | $833,657 | 25.4 min |
| Whatcom County, WA | 230,493 | $82,153 | $487,382 | 17.9 min |
| Island County, WA | 86,836 | $92,129 | $623,893 | 17.5 min |
| Kitsap County, WA | 276,921 | $104,681 | $617,222 | 21.8 min |
Frequently Asked Questions
Common questions about Snohomish County, Washington.
How big is Snohomish County, Washington by population?
About 843,136 people live in Snohomish County, Washington, in 315,741 households of 2.6 people on average. The median age is 36.5, close to the U.S. median of 37.3.
Is Snohomish County, Washington mostly urban or rural?
Averaged over its land area, Snohomish County, Washington has 384 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 4.4 times the U.S. average of 86.
Can a typical household afford a home in Snohomish County, Washington?
The median home costs 4.9 times the median household income ($550,004 against $111,921), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,948 a month takes about 21% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
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