Westchester County, New York

County seat: White Plains · Population 1 million (2025) · 431 sq mi

Westchester County is the 7th most populous of New York's 62 counties, with 1,015,743 people (2025 estimate). Its county seat is White Plains. The map shows its 29 cities and towns and the 6 neighboring counties.

Map of Westchester County, New York with cities, towns and the county boundary
Westchester County, New York with its cities and towns, unincorporated communities (CDPs) and neighboring counties. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
Download PDF (Letter) 244 KBPNG image 187 KBNew York county map

Westchester County facts

County seat
White Plains
Population (2025 estimate)
1,015,743 +1.1% since 2020
Land area
431 sq mi 47th largest of 62
Water area
69 sq mi
Population density
2,358 per sq mi
Established
1683
Named after
Chester city in Cheshire, England
Largest city
Yonkers 212,603
Median household income
$118,976
Cities and towns
29 plus 27 CDPs
ZIP codes
78
Time zone
Eastern
FIPS code
36119

Cities and towns in Westchester County

Westchester County has 29 incorporated cities, towns and villages. Populations count the people living inside Westchester County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
YonkersCity212,603
New RochelleCity85,864
Mount VernonCity72,304
White Plains (county seat)City62,871
Port ChesterVillage32,303
HarrisonVillage32,273
OssiningVillage27,579
PeekskillCity25,891
MamaroneckVillage19,896
ScarsdaleVillage18,194
RyeCity16,614
TarrytownVillage11,890
Dobbs FerryVillage11,645
Sleepy HollowVillage11,474
Mount KiscoVillage10,757
Rye BrookVillage9,955
Hastings-on-HudsonVillage8,440
Croton-on-HudsonVillage8,282
PelhamVillage7,608
Briarcliff ManorVillage7,481
PleasantvilleVillage7,391
TuckahoeVillage7,029
LarchmontVillage6,750
IrvingtonVillage6,533
BronxvilleVillage6,504
Pelham ManorVillage5,631
ElmsfordVillage5,203
ArdsleyVillage5,007
BuchananVillage2,629

Unincorporated communities (CDPs)

Census-designated places are communities without their own city government; the county provides their services.

CommunityPopulationAlso in
Eastchester20,491
Jefferson Valley-Yorktown14,154
Greenville9,280
Lake Mohegan5,468
Hawthorne4,878
Armonk4,429
Thornwood4,140
Heritage Hills4,094
Montrose3,717
Chappaqua3,046
Fairview3,034
Valhalla2,937
Hartsdale2,903
Shrub Oak2,498
Bedford Hills2,488
Crompond2,418
Katonah2,176
Yorktown Heights1,966
Bedford1,874
Golden's Bridge1,815
Crugers1,634
Shenorock1,558
Lincolndale1,323
Millwood1,083
Scotts Corners719
Verplanck650
Peach Lake416Putnam County

ZIP codes in Westchester County

78 ZIP codes reach into Westchester County. ZIP codes ignore county lines, so some also cover a neighboring county.

Population of Westchester County, 2020–2025

Westchester County grew by 11,287 people (+1.1%) between April 2020 and July 2025: 11,509 more births than deaths and a net loss of 1,315 people from migration.

Year (July 1)Population
20201,001,451
20211,000,252
2022994,313
2023998,335
20241,009,165
20251,015,743

Neighboring counties

Printable Westchester County map

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Sources

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