113,012 people (2024 Census estimate, +0.6% since 2020)
644 square miles of land · 175 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.
35 active community water systems list Ontario County in the area they serve, reporting 89,768 people served in all (a system that crosses county lines counts its whole population).
| GENEVA CITY surface water · local government · NY3401156 | 13,334 served |
| CANANDAIGUA-FARMINGTON CONSOLIDATED W.D. buys surface water · local government · NY3401151 | 13,000 served |
| CANANDAIGUA CITY surface water · local government · NY3401150 | 11,264 served |
| MCWA - GENEVA buys surface water · local government · NY3404515 | 8,532 served |
| CANANDAIGUA TOWN CONS. WD buys surface water · local government · NY3430008 | 6,800 served |
| HOPEWELL CONS WD 1 buys surface water · local government · NY3411948 | 3,781 served |
| GORHAM TOWN WD surface water · local government · NY3401170 | 3,420 served |
| GENEVA WD #2 CSA groundwater · local government · NY3404514 | 2,680 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 92 people were held in Ontario County's jail, in Vera's latest figure (2026). In 2021 it was about 84.
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.
9 school districts have their office in Ontario County. School taxes are usually the largest part of a property tax bill.
Spent $92.5 million — $80.9 million to run schools, about $18,686 per student, plus $7 million on buildings and equipment. Money in: $63.2 million local (mostly property tax), $35.6 million state, $3.9 million federal. Long-term debt: $39.6 million.
Spent $107.2 million — $76.7 million to run schools, about $23,332 per student, plus $26.9 million on buildings and equipment. Money in: $53.2 million local (mostly property tax), $34.3 million state, $6.8 million federal. Long-term debt: $16.9 million.
Spent $67.3 million — $53.4 million to run schools, about $25,073 per student, plus $4.1 million on buildings and equipment. Money in: $24.9 million local (mostly property tax), $41.4 million state, $8.4 million federal. Long-term debt: $19.9 million.
Spent $50.6 million — $39.2 million to run schools, about $25,790 per student, plus $9.9 million on buildings and equipment. Money in: $15.6 million local (mostly property tax), $26.9 million state, $4.1 million federal. Long-term debt: $14.2 million.
Spent $40.8 million — $33.6 million to run schools, about $29,339 per student, plus $1.4 million on buildings and equipment. Money in: $17.2 million local (mostly property tax), $20 million state, $2.8 million federal. Long-term debt: $30.5 million.
Spent $22.9 million — $20.9 million to run schools, about $25,823 per student, plus $876,000 on buildings and equipment. Money in: $11.5 million local (mostly property tax), $13.4 million state, $1.6 million federal. Long-term debt: $10.5 million.
Spent $30.7 million — $20.7 million to run schools, about $28,414 per student, plus $8.8 million on buildings and equipment. Money in: $8.2 million local (mostly property tax), $13.8 million state, $1.9 million federal. Long-term debt: $9.4 million.
Spent $21.5 million — $18.8 million to run schools, about $30,744 per student, plus $1.4 million on buildings and equipment. Money in: $12.9 million local (mostly property tax), $9.4 million state, $1.8 million federal. Long-term debt: $19.6 million.
And 1 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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Ontario County about $26.6 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.
180 bridges in Ontario County: 62 in good condition, 101 fair, and 17 poor (9.4%). “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.
| RTE I90 over CANANDAIGUA OUTLET · built 1953 | 36,591 vehicles a day |
| RTE I90 over FALL BROOK · built 1954 | 18,825 vehicles a day |
| RTE I90 over FALL BROOK · built 1954 | 18,296 vehicles a day |
| RTE 5 over MARSH CREEK · built 1958 | 12,765 vehicles a day |
| PORT GIBSON ROAD over 90IX EB · built 1954 | 3,075 vehicles a day |
| PORT GIBSON ROAD over RTE I90 · built 1954 | 3,075 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $16.9 million of work in Ontario County in fiscal 2025, about $150 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 York 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 Ontario 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 Ontario County built: brayden.ozark@gmail.com.
More of New York: the state government and every county in New York.
Nearby counties: Yates County (18 mi) · Seneca County (25 mi) · Livingston County (26 mi) · Wayne County (28 mi) · Monroe County (34 mi) · Schuyler County (35 mi).