86,478 people (2024 Census estimate, −0.6% since 2020)
208 square miles of land · 415 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.
234 active community water systems list Island County in the area they serve, reporting 91,945 people served in all (a system that crosses county lines counts its whole population).
| OAK HARBOR CITY OF buys surface water · local government · WA5362650 | 23,675 served |
| NAVAL AIR STATION/WHIDBEY ISLAND buys surface water · federal · WA5303420 | 16,595 served |
| COUPEVILLE TOWN OF groundwater · local government · WA5315550 | 4,142 served |
| CAMANO WATER ASSOCIATION groundwater · private · WA5310750 | 2,592 served |
| CLINTON WATER DISTRICT groundwater · local government · WA5313900 | 1,980 served |
| LANGLEY CITY OF groundwater · local government · WA5345950 | 1,416 served |
| HARBOR HILLS COMMUNITY WATER SYSTEM groundwater · local government · WA5333860 | 1,373 served |
| FREELAND WATER AND SEWER DISTRICT groundwater · local government · WA5326450 | 1,264 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 40 people were held in Island County's jail, in Vera's latest figure (2021), or 78 per 100,000 residents ages 15–64. In 2016 it was about 50.
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.
4 school districts have their office in Island County. School taxes are usually the largest part of a property tax bill.
Spent $111.8 million — $107.8 million to run schools, about $18,813 per student, plus $3.3 million on buildings and equipment. Money in: $17.4 million local (mostly property tax), $76.4 million state, $19.9 million federal. Long-term debt: $8.6 million.
Spent $58.5 million — $56.1 million to run schools, about $15,842 per student, plus $531,000 on buildings and equipment. Money in: $12.7 million local (mostly property tax), $42.7 million state, $4.9 million federal. Long-term debt: $38.8 million.
Spent $25.7 million — $22.1 million to run schools, about $18,378 per student, plus $2.9 million on buildings and equipment. Money in: $6.5 million local (mostly property tax), $16 million state, $4.2 million federal.
Spent $19.7 million — $18.6 million to run schools, about $17,670 per student, plus $570,000 on buildings and equipment. Money in: $5.9 million local (mostly property tax), $13.8 million state, $1.5 million federal. Long-term debt: $1.9 million.
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 Island County about $39.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
7 bridges in Island County: 2 in good condition, 5 fair, and 0 poor (0.0%). “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.
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $22.4 million of work in Island County in fiscal 2025, about $258 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 Island 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 Island County built: brayden.ozark@gmail.com.
More of Washington: the state government and every county in Washington.
Nearby counties: San Juan County (31 mi) · Kitsap County (36 mi) · Snohomish County (42 mi) · Skagit County (46 mi) · Jefferson County (46 mi) · Clallam County (56 mi).