864,113 people (2024 Census estimate, +4.1% since 2020)
2,087 square miles of land · 414 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
119 active community water systems list Snohomish County in the area they serve, reporting 1,026,929 people served in all (a system that crosses county lines counts its whole population).
| ALDERWOOD WATER DISTRICT buys surface water · local government · WA5301300 | 245,715 served |
| EVERETT PUBLIC WORKS DEPT. CITY OF surface water · local government · WA5324050 | 215,774 served |
| MARYSVILLE UTILITIES buys surface water · local government · WA5351900 | 88,582 served |
| LYNNWOOD CITY OF buys surface water · local government · WA5349270 | 68,204 served |
| SNO PUD 1 - LAKE STEVENS buys surface water · local government · WA5380907 | 67,710 served |
| SILVER LAKE WATER & SEWER DISTRICT buys surface water · local government · WA5379250 | 65,033 served |
| EDMONDS CITY OF buys surface water · local government · WA5322500 | 34,065 served |
| Mukilteo Water & Wastewater Distr buys surface water · local government · WA5357550 | 31,437 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 519 people were held in Snohomish County's jail, in Vera's latest figure (2023), or 92 per 100,000 residents ages 15–64. In 2018 it was about 1,011.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
15 school districts have their office in Snohomish County. School taxes are usually the largest part of a property tax bill.
Spent $501.5 million — $426.2 million to run schools, about $18,578 per student, plus $45.1 million on buildings and equipment. Money in: $176.9 million local (mostly property tax), $301.1 million state, $14 million federal. Long-term debt: $609 million.
Spent $421.2 million — $382.8 million to run schools, about $18,710 per student, plus $19.8 million on buildings and equipment. Money in: $147 million local (mostly property tax), $282.4 million state, $29.5 million federal. Long-term debt: $213.2 million.
Spent $418.1 million — $374.5 million to run schools, about $18,396 per student, plus $32.5 million on buildings and equipment. Money in: $117.2 million local (mostly property tax), $278.4 million state, $32.6 million federal. Long-term debt: $107.9 million.
Spent $374 million — $308.3 million to run schools, about $20,374 per student, plus $52.9 million on buildings and equipment. Money in: $90.5 million local (mostly property tax), $220.3 million state, $27.6 million federal. Long-term debt: $185.8 million.
Spent $200.4 million — $190.8 million to run schools, about $18,709 per student, plus $4 million on buildings and equipment. Money in: $31.5 million local (mostly property tax), $143.5 million state, $23.1 million federal. Long-term debt: $36.6 million.
Spent $171.7 million — $159.7 million to run schools, about $16,485 per student, plus $4.2 million on buildings and equipment. Money in: $41.8 million local (mostly property tax), $128.8 million state, $9.1 million federal. Long-term debt: $106.5 million.
Spent $184.7 million — $161.6 million to run schools, about $17,157 per student, plus $7.2 million on buildings and equipment. Money in: $68.1 million local (mostly property tax), $122.8 million state, $6.9 million federal. Long-term debt: $228.2 million.
Spent $103.7 million — $98.3 million to run schools, about $17,142 per student, plus $720,000 on buildings and equipment. Money in: $27 million local (mostly property tax), $75.5 million state, $8.8 million federal. Long-term debt: $88.4 million.
And 7 more.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively High compared with other U.S. counties. FEMA estimates natural hazards cost Snohomish County about $409.2 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
500 bridges in Snohomish County: 248 in good condition, 232 fair, and 20 poor (4.0%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| ALDERWOOD MALL BLV over SR 524/196TH ST SW · built 1999 | 19,198 vehicles a day |
| SR 529 over STEAMBOAT SLOUGH · built 1927 | 16,592 vehicles a day |
| SR 529 over UNION SL · built 1927 | 16,439 vehicles a day |
| SR 529 over UNION SL · built 1954 | 16,439 vehicles a day |
| SR 529 over SNOHOMISH RIVER · built 1927 | 16,286 vehicles a day |
| SR 529 over SNOHOMISH RIVER · built 1954 | 16,286 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $131.4 million of work in Snohomish County in fiscal 2025, about $159 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
Registration deadlines, early voting and polling places for Washington are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Snohomish County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Snohomish County built: brayden.ozark@gmail.com.
More of Washington: the state government and every county in Washington.
Nearby counties: Skagit County (30 mi) · King County (39 mi) · Island County (42 mi) · Kitsap County (50 mi) · Whatcom County (54 mi) · Chelan County (55 mi).