14,670 people (2024 Census estimate, +3.0% since 2020)
46 square miles of land · 318 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.
2 active community water systems list Nantucket County in the area they serve, reporting 30,703 people served in all (a system that crosses county lines counts its whole population).
| WANNACOMET WATER COMPANY groundwater · local government · MA4197000 | 27,703 served |
| SIASCONSET WATER DEPARTMENT groundwater · local government · MA4197001 | 3,000 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 17 people were held in Nantucket County's jail, in Vera's latest figure (2024), or 177 per 100,000 residents ages 15–64. In 2019 it was about 21.
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.
1 school district has its office in Nantucket County. School taxes are usually the largest part of a property tax bill.
Spent $59 million — $49.8 million to run schools, about $28,849 per student, plus $5.8 million on buildings and equipment. Money in: $44.7 million local (mostly property tax), $9 million state, $2.2 million federal. Long-term debt: $40.7 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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Nantucket County about $22.9 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
2 bridges in Nantucket County: 0 in good condition, 2 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 $3.7 million of work in Nantucket County in fiscal 2025, about $262 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.
State election: Tuesday, November 3, 2026. Early voting: 2026-10-17 to 2026-10-30. Last day to register to vote: 2026-10-24. Mail ballot request deadline: 2026-10-27. Election Day: 2026-11-03. Last day for mailed ballots to arrive: 2026-11-06.
Source: Secretary of the Commonwealth, 2026 Information for Voters, p. 4 · Cambridge Election Commission, 2026 State Election guide (return deadlines) · Mass. General Laws ch. 54, sec. 93
The budget, property tax rates, audits, local officials and offices for Nantucket 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 Nantucket County built: brayden.ozark@gmail.com.
More of Massachusetts: the state government and every county in Massachusetts.
Nearby counties: Barnstable County (29 mi) · Dukes County (32 mi) · Plymouth County (58 mi) · Bristol County (60 mi) · Newport County, RI (63 mi) · Bristol County, RI (68 mi).