44,012 people (2024 Census estimate, +2.2% since 2020)
538 square miles of land · 82 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.
15 active community water systems list Sullivan County in the area they serve, reporting 24,526 people served in all (a system that crosses county lines counts its whole population).
| CLAREMONT WATER DEPT surface water · local government · NH0461010 | 9,000 served |
| NEWPORT WATER WORKS surface water · local government · NH1741010 | 5,000 served |
| VILLAGE DIST OF EASTMAN groundwater · local government · NH0951010 | 3,400 served |
| CHARLESTOWN WATER WORKS groundwater · local government · NH0411010 | 2,850 served |
| SUNAPEE WATER WORKS surface water · local government · NH2271010 | 1,680 served |
| MERIDEN VILLAGE WATER DIST groundwater · local government · NH1921020 | 750 served |
| SULLIVAN COUNTY COMPLEX groundwater · local government · NH2384010 | 625 served |
| GEORGES MILLS WATER WORKS groundwater · local government · NH2271020 | 500 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 56 people were held in Sullivan County's jail, in Vera's latest figure (2019), or 206 per 100,000 residents ages 15–64. In 2014 it was about 65.
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.
10 school districts have their office in Sullivan County. School taxes are usually the largest part of a property tax bill.
Spent $39.6 million — $38.6 million to run schools, about $23,049 per student, plus $575,000 on buildings and equipment. Money in: $17.1 million local (mostly property tax), $16.1 million state, $6.9 million federal. Long-term debt: $6.7 million.
Spent $36 million — $34.3 million to run schools, about $24,061 per student, plus $1.4 million on buildings and equipment. Money in: $21.5 million local (mostly property tax), $11.7 million state, $3.4 million federal. Long-term debt: $319,000.
Spent $21.8 million — $19.4 million to run schools, about $23,673 per student, plus $2.3 million on buildings and equipment. Money in: $9.8 million local (mostly property tax), $8.7 million state, $2.9 million federal. Long-term debt: $4.8 million.
Spent $18.1 million — $12.8 million to run schools, about $34,037 per student, plus $5.4 million on buildings and equipment. Money in: $10.5 million local (mostly property tax), $2.8 million state, $1.2 million federal.
Spent $10.2 million — $6.4 million to run schools, about $23,520 per student, plus $294,000 on buildings and equipment. Money in: $7.7 million local (mostly property tax), $2.2 million state, $289,000 federal. Long-term debt: $3.1 million.
Spent $7.7 million — $6.3 million to run schools, about $30,298 per student, plus $110,000 on buildings and equipment. Money in: $5.1 million local (mostly property tax), $1.8 million state, $368,000 federal. Long-term debt: $50,000.
Spent $4.6 million — $3.6 million to run schools, about $29,080 per student, plus $47,000 on buildings and equipment. Money in: $3.3 million local (mostly property tax), $1.1 million state, $173,000 federal.
Spent $3.5 million — $2.8 million to run schools, about $23,991 per student, plus $15,000 on buildings and equipment. Money in: $2.3 million local (mostly property tax), $993,000 state, $299,000 federal.
And 2 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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Sullivan County about $15 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.
158 bridges in Sullivan County: 70 in good condition, 79 fair, and 9 poor (5.7%). “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.
| CORNISH TOLL BR RD over CONNECTICUT RIVER · built 1866 | 2,722 vehicles a day |
| PLAINS ROAD over SUGAR RIVER · built 1974 | 1,376 vehicles a day |
| NH 12A over SUGAR RIVER · built 1967 | 1,067 vehicles a day |
| STAGE ROAD over BLOW-ME-DOWN BROOK · built 1954 | 574 vehicles a day |
| BRIDGE STREET over NECRR · built 1992 | 534 vehicles a day |
| LEAVITT HILL ROAD over BLOW-ME-DOWN-BROOK · built 1950 | 112 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $9.8 million of work in Sullivan County in fiscal 2025, about $227 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 New Hampshire 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 Sullivan 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 Sullivan County built: brayden.ozark@gmail.com.
More of New Hampshire: the state government and every county in New Hampshire.
Nearby counties: Windsor County, VT (24 mi) · Merrimack County (28 mi) · Cheshire County (30 mi) · Windham County, VT (36 mi) · Hillsborough County (40 mi) · Belknap County (41 mi).