Voter file loaded June 9, 2026 · figures are from that file, held as a fixed record
Snohomish County, Washington has 542,363 active registered voters across 872 precincts, as of July 2026.
Party registration
Washington doesn't register voters by party, so there's no party breakdown to show. Party lean is usually inferred from primary participation; that data is in the voter file and available inside Motion51.
How Snohomish County voted for president
Election results are public records.
Snohomish County at a glance.
Snohomish County had an estimated 864,113 residents in July 2024, the third most populous of Washington's 39 counties, up 4.4% since the 2020 census. Of those, 677,708 are 18 or older, the voting-age population, and 15.5% are 65 or older. Its 542,363 active registered voters equal about 80.0% of that voting-age population.
It covers 2,086 square miles of land (414 people per square mile), and 43.5% of residents live outside any incorporated city or town. The largest cities and towns are Everett (113,011), Marysville (76,209), Edmonds (42,871), Lynnwood (41,597) and Lake Stevens (41,350). The American Community Survey (2020-2024) puts it at a median age of 38.6, a median household income of $111,246, 38.2% of adults 25 and older holding a bachelor's degree or higher and 68.2% of occupied homes owned by the people living in them.
In 2024, 415,327 votes were cast for president, about 61.3% of the voting-age population; the Democratic ticket took 57.8% and the Republican ticket 38.9%. The two-party margin moved from D+18.9 in 2008 to D+18.9 in 2024.
- Population (2024 estimate)
- 864,113
- Population (2020 census base)
- 827,955
- Voting-age population (18+)
- 677,708
- Active voters per 100 adults
- 80.0
- Residents 65 and older
- 15.5%
- People per square mile
- 414
- Living outside incorporated places
- 43.5%
- Land area
- 2,086 sq mi
- Median age
- 38.6
- Median household income
- $111,246
- Adults 25+ with a bachelor's degree
- 38.2%
- Owner-occupied homes
- 68.2%
Largest cities and towns
- Everett 113,011
- Marysville 76,209
- Edmonds 42,871
- Lynnwood 41,597
- Lake Stevens 41,350
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 57.8% | 38.9% | D+18.9 | 415,327 |
| 2020 | 58.5% | 37.9% | D+20.6 | 438,796 |
| 2016 | 54.3% | 37.6% | D+16.7 | 309,496 |
| 2012 | 56.9% | 40.7% | D+16.2 | 298,759 |
| 2008 | 58.5% | 39.6% | D+18.9 | 320,333 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
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