Washington County, Pennsylvania

County seat: Washington · Population 210,802 (2025) · 857 sq mi

Washington County is the 18th most populous of Pennsylvania's 67 counties, with 210,802 people (2025 estimate). Its county seat is Washington. It is part of the District 12 region, one of the 11 PennDOT engineering districts. The map shows its 34 cities and towns and the 9 neighboring counties.

Map of Washington County, Pennsylvania with cities, towns and the county boundary
Washington County, Pennsylvania 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) 190 KBPNG image 146 KBPennsylvania county map

Washington County facts

County seat
Washington
Population (2025 estimate)
210,802 +0.7% since 2020
Land area
857 sq mi 18th largest of 67
Water area
4 sq mi
Population density
246 per sq mi
Established
1781
Same name
One of 30 Washington Counties in the US
Named after
George Washington Founding Father and first U.S. president (1732–1799)
Largest city
Peters 23,262
Median household income
$78,958
Cities and towns
34 plus 37 CDPs
ZIP codes
65
Time zone
Eastern
FIPS code
42125

Cities and towns in Washington County

Washington County has 34 incorporated cities, towns and villages. Populations count the people living inside Washington County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
Washington (county seat)City13,377
CanonsburgBorough9,529
CaliforniaBorough4,615
DonoraBorough4,462
CharleroiBorough4,112
MonongahelaCity4,041
CentervilleBorough3,223
BentleyvilleBorough2,326
New EagleBorough2,018
East WashingtonBorough1,814
McDonaldBorough1,623Allegheny County
BurgettstownBorough1,390
North CharleroiBorough1,283
HoustonBorough1,126
SpeersBorough1,047
West BrownsvilleBorough960
MidwayBorough908
EllsworthBorough899
DeemstonBorough735
ClaysvilleBorough706
RoscoeBorough701
CokeburgBorough607
AllenportBorough469
StockdaleBorough414
Long BranchBorough410
BeallsvilleBorough389
MariannaBorough386
DunlevyBorough363
FinleyvilleBorough360
ElcoBorough257
TwilightBorough236
Coal CenterBorough110
West MiddletownBorough107
Green HillsBorough17

Unincorporated communities (CDPs)

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

CommunityPopulationAlso in
McGovern4,393
McMurray4,286
Thompsonville3,646
Southpointe3,136
Gastonville2,995
Wolfdale2,938
Cecil-Bishop2,910
Muse2,529
Baidland1,809
Wickerham Manor-Fisher1,247
Lawrence1,154
Hickory987
Wylandville890
Slovan714
Avella688
Laboratory664
Paris652
Langeloth632
Eighty Four626
Joffre610
Strabane605
Van Voorhis516
Meadowlands495
West Alexander491
Fredericktown488
Atlasburg482
Southview303
Millsboro282
Elrama279
Hendersonville243
Aaronsburg212
Midland196
Taylorstown176
Cross Creek164
East Marianna141
Bulger119
Westland40

ZIP codes in Washington County

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

Population of Washington County, 2020–2025

Washington County grew by 1,471 people (+0.7%) between April 2020 and July 2025: 4,593 more deaths than births and a net gain of 6,092 people from migration.

Year (July 1)Population
2020209,413
2021210,116
2022209,981
2023210,442
2024210,635
2025210,802

Neighboring counties

Printable Washington County map

The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.

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Sources

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