1,006,447 people (2024 Census estimate, +0.5% since 2020)
431 square miles of land · 2,336 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.
92 active community water systems list Westchester County in the area they serve, reporting 959,423 people served in all (a system that crosses county lines counts its whole population).
| YONKERS CITY buys surface water · local government · NY5903465 | 211,569 served |
| VEOLIA WATER NEW YORK, INC. RD-1 buys surface water · private · NY5903444 | 146,732 served |
| MOUNT VERNON WATER DEPARTMENT buys surface water · local government · NY5903441 | 73,893 served |
| WESTCHESTER JOINT WATER WORKS surface water · local government · NY5903435 | 59,629 served |
| WHITE PLAINS CITY buys surface water · local government · NY5903464 | 59,559 served |
| VEOLIA WATER NEW YORK, INC. RD-2 buys surface water · private · NY5903456 | 57,301 served |
| GREENBURGH CONSOLIDATED WD #1 buys surface water · local government · NY5903429 | 43,312 served |
| YORKTOWN CONSOLD. WATER DIST.#1 buys surface water · local government · NY5903469 | 36,000 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 548 people were held in Westchester County's jail, in Vera's latest figure (2026). In 2021 it was about 685.
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.
40 school districts have their office in Westchester County. School taxes are usually the largest part of a property tax bill.
Spent $809.2 million — $720.9 million to run schools, about $29,389 per student, plus $28.3 million on buildings and equipment. Money in: $271.6 million local (mostly property tax), $441 million state, $76.2 million federal. Long-term debt: $221.6 million.
Spent $332.6 million — $305.4 million to run schools, about $30,628 per student, plus $14.7 million on buildings and equipment. Money in: $225.4 million local (mostly property tax), $81 million state, $21.6 million federal. Long-term debt: $147.6 million.
Spent $296.1 million — $261.3 million to run schools, about $37,274 per student, plus $1.1 million on buildings and equipment. Money in: $132.6 million local (mostly property tax), $131.5 million state, $25.1 million federal. Long-term debt: $159.2 million.
Spent $316.5 million — $227.9 million to run schools, about $33,900 per student, plus $5.3 million on buildings and equipment. Money in: $206.5 million local (mostly property tax), $51.5 million state, $9.9 million federal. Long-term debt: $51.4 million.
Spent $173 million — $142.3 million to run schools, about $25,989 per student, plus $22.9 million on buildings and equipment. Money in: $141.8 million local (mostly property tax), $13.8 million state, $4.1 million federal. Long-term debt: $65.2 million.
Spent $199 million — $170.2 million to run schools, about $31,419 per student, plus $7 million on buildings and equipment. Money in: $115.1 million local (mostly property tax), $63.1 million state, $7.3 million federal. Long-term debt: $13.1 million.
Spent $167.7 million — $148.7 million to run schools, about $30,174 per student, plus $4 million on buildings and equipment. Money in: $101.8 million local (mostly property tax), $52.3 million state, $8.1 million federal. Long-term debt: $33.4 million.
Spent $178.4 million — $166.8 million to run schools, about $35,449 per student, plus $6 million on buildings and equipment. Money in: $167 million local (mostly property tax), $10.2 million state, $1.3 million federal. Long-term debt: $58.4 million.
And 32 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 High compared with other U.S. counties. FEMA estimates natural hazards cost Westchester County about $209.8 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
776 bridges in Westchester County: 174 in good condition, 519 fair, and 83 poor (10.7%). “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.
| RTE 907K over 907G X MC QUESTEN AVENU · built 1983 | 143,278 vehicles a day |
| RTE I95 over RTE 1 · built 1955 | 107,326 vehicles a day |
| RTE I684 over WEST BRANCH TITICUS RIVE · built 1962 | 75,503 vehicles a day |
| RTE 987D over 907K Ramp to SMRP RTE · built 1940 | 67,953 vehicles a day |
| RTE I684 over MUSCOOT RESERVOIR OUTLET · built 1972 | 63,160 vehicles a day |
| RTE 987G over RTE 129 · built 1964 | 56,221 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $424.1 million of work in Westchester County in fiscal 2025, about $422 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 Westchester 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 Westchester County built: brayden.ozark@gmail.com.
More of New York: the state government and every county in New York.
Nearby counties: Rockland County (14 mi) · Western Connecticut Planning Region, CT (18 mi) · Putnam County (19 mi) · Bergen County, NJ (22 mi) · Bronx County (22 mi) · Greater Bridgeport Planning Region, CT (28 mi).