33,944 people (2024 Census estimate, +2.7% since 2020)
1,804 square miles of land · 19 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.
24 active community water systems list Jefferson County in the area they serve, reporting 40,464 people served in all (a system that crosses county lines counts its whole population).
| PORT TOWNSEND CITY OF surface water · local government · WA5369000 | 17,053 served |
| QUIMPER groundwater · local government · WA5305783 | 14,548 served |
| OLYMPIC WATER & SEWER INC groundwater · private · WA5368700 | 3,086 served |
| CAPE GEORGE COLONY CLUB INC groundwater · private · WA5311050 | 1,022 served |
| BYWATER BAY groundwater · local government · WA5302043 | 628 served |
| BRIDGEHAVEN COMMUNITY CLUB groundwater · private · WA5308330 | 623 served |
| JEFFERSON COUNTY WATER DIST #1 groundwater · local government · WA5336705 | 600 served |
| OLYMPIC CORRECTIONS CENTER groundwater · state · WA5313560 | 390 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 20 people were held in Jefferson County's jail, in Vera's latest figure (2021), or 116 per 100,000 residents ages 15–64. In 2016 it was about 43.
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.
5 school districts have their office in Jefferson County. School taxes are usually the largest part of a property tax bill.
Spent $25.9 million — $22.7 million to run schools, about $18,800 per student, plus $1.4 million on buildings and equipment. Money in: $8.8 million local (mostly property tax), $14.8 million state, $3.3 million federal. Long-term debt: $30.7 million.
Spent $10.6 million — $10.3 million to run schools, about $14,140 per student, plus $241,000 on buildings and equipment. Money in: $1.2 million local (mostly property tax), $9.3 million state, $668,000 federal.
Spent $16.7 million — $15 million to run schools, about $20,895 per student, plus $1.7 million on buildings and equipment. Money in: $4.3 million local (mostly property tax), $10.6 million state, $2 million federal.
Spent $2.2 million — $1.8 million to run schools, about $24,243 per student, plus $349,000 on buildings and equipment. Money in: $343,000 local (mostly property tax), $1.6 million state, $340,000 federal.
Spent $1.4 million — $1.1 million to run schools, about $27,700 per student, plus $238,000 on buildings and equipment. Money in: $122,000 local (mostly property tax), $1.1 million state, $625,000 federal.
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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Jefferson County about $17 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
97 bridges in Jefferson County: 58 in good condition, 34 fair, and 5 poor (5.2%). “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.
| SR 104 WESTHALF over HOOD CANAL · built 1982 | 18,159 vehicles a day |
| US 101 over BIG QUILCENE RIVER · built 1936 | 3,525 vehicles a day |
| SR 20 over PUGET SND @ PT TOWNSEND · built 1955 | 63 vehicles a day |
| OLD TARBOO ROAD over TARBOO CREEK · built 2005 | 50 vehicles a day |
| NO DATA ENTERED over DUCKABUSH RIVER · built 1960 | 25 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $17.7 million of work in Jefferson County in fiscal 2025, about $536 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 Jefferson 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 Jefferson County built: brayden.ozark@gmail.com.
More of Washington: the state government and every county in Washington.
Nearby counties: Clallam County (27 mi) · Mason County (35 mi) · Kitsap County (42 mi) · Island County (47 mi) · Grays Harbor County (50 mi) · San Juan County (52 mi).