• Elizabeth
  Elizabeth, Pennsylvania
  Elizabeth is a borough in Allegheny County, Pennsylvania, on the east bank of the Monongahela River, where Pennsylvania Route 51 crosses, upstream of Pittsburgh and close to the county line. The population was 1,493 at the 2010 census...
  
  
• Forward Township
  Forward Township, Allegheny County, Pennsylvania
  Forward Township is a township in Allegheny County, Pennsylvania, United States. The population was 3,376 at the 2010 census. The township is named after Walter Forward, U.S...
  
  
• McDonald
  McDonald, Pennsylvania
  McDonald is a borough in Allegheny and Washington counties in the U.S. state of Pennsylvania, 18 miles southwest of Pittsburgh. In the past, manufactories of bottles, oil-well drilling tools, flour-mill products, etc., existed here. Oil and coal were and still are procured in the area...
  
   (Allegheny County Portion)
• West Elizabeth
  West Elizabeth, Pennsylvania
  West Elizabeth is a borough in Allegheny County, Pennsylvania, United States. The population was 518 at the 2010 census.-Geography:West Elizabeth is located at ....
  
  

• Frankfort Springs
  Frankfort Springs, Pennsylvania
  Frankfort Springs is a borough in Beaver County, Pennsylvania, United States. The population was 130 at the 2000 census.-Geography:Frankfort Springs is located at ....
  
  
• Greene Township
  Greene Township, Beaver County, Pennsylvania
  Greene Township is a township in Beaver County, Pennsylvania, United States. The population was 2,705 at the 2000 census.-Geography:Greene Township is a largely rural area in the southwestern part of Beaver County, Pennsylvania. According to the United States Census Bureau, the township has a total...
  
  
• Hanover Township
  Hanover Township, Beaver County, Pennsylvania
  Hanover Township is a township in Beaver County, Pennsylvania, United States. The population was 3,529 at the 2000 census.-History:Two historic sites in Hanover Township are listed on the National Register of Historic Places: the David Littell House, a nineteenth-century farmhouse, and the...
  
  
• Hookstown
  Hookstown, Pennsylvania
  Hookstown is a borough in Beaver County, Pennsylvania, United States. The population was 152 at the 2000 census.-History:Hookstown was the birthplace of Robert Justice...
  
  
• Independence Township
  Independence Township, Beaver County, Pennsylvania
  Independence Township is a township in Beaver County, Pennsylvania, United States. The population was 2,802 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , of which, of it is land and of it is water.-Demographics:As of the census of...
  
  
• Raccoon Township
  Raccoon Township, Pennsylvania
  Raccoon Township is a township in Beaver County, Pennsylvania, United States. The population was 3,397 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of 19.3 square miles , of which, 18.5 square miles of it is land and...
  
  

• Amwell Township
  Amwell Township, Pennsylvania
  Amwell Township is a township in Washington County, Pennsylvania, United States. The population was 3,960 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , all of it land.-History:...
  
  
• Beallsville
  Beallsville, Pennsylvania
  Beallsville is a borough in Washington County, Pennsylvania, United States. The population was 511 at the 2000 census. Much of the borough has been designated the Beallsville Historic District.-Geography:Beallsville is located at ....
  
  
• Bentleyville
  Bentleyville, Pennsylvania
  Bentleyville is a borough in Washington County, Pennsylvania, United States. The population was 2,502 at the 2000 census.-Geography:Bentleyville is located at . U.S...
  
  
• Blaine Township
  Blaine Township, Pennsylvania
  Blaine Township is a township in Washington County, Pennsylvania, United States. The population was 597 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , all of it land. It is named after former United States Secretary of State and...
  
  
• Buffalo Township
  Buffalo Township, Washington County, Pennsylvania
  Buffalo Township is a township in Washington County, Pennsylvania, United States. The population was 2,100 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , of which, of it is land and 0.05% is water.-Demographics:As of the census of...
  
  
• Burgettstown
  Burgettstown, Pennsylvania
  Burgettstown is a borough in Washington County, Pennsylvania, United States. It is a suburb of Pittsburgh, Pennsylvania. The population was 1,576 according to the 2000 census.-History:...
  
  
• Canonsburg
  Canonsburg, Pennsylvania
  Canonsburg is a borough in Washington County, Pennsylvania, southwest of Pittsburgh. Canonsburg was laid out by Colonel John Canon in 1789 and incorporated in 1802....
  
  
• Canton Township
  Canton Township, Washington County, Pennsylvania
  Canton Township is a township in Washington County, Pennsylvania, United States. The population was 8,826 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , all of it land.-Demographics:...
  
  
• Carroll Township
  Carroll Township, Washington County, Pennsylvania
  Carroll Township is a township in Washington County, Pennsylvania, United States. The population was 5,677 at the 2000 census.Carroll Township is strongly allied with the City of Monongahela and the boroughs of Donora and New Eagle...
  
  
• Cecil Township
  Cecil Township, Pennsylvania
  Cecil Township is a township in Washington County, Pennsylvania, United States. It is a suburb of Pittsburgh in the Pittsburgh metropolitan area. The population was 11,271 at the 2010 census.The township contains the Southpointe suburban business park...
  
  
• Centerville
  Centerville, Washington County, Pennsylvania
  Centerville is a borough in Washington County, Pennsylvania, United States. The population was 3,390 at the 2000 census.-Geography:Centerville is located at ....
  
  
• Chartiers Township
  Chartiers Township, Pennsylvania
  Chartiers Township is a township in Washington County, Pennsylvania, United States. The population was 7,818 at the 2010 census. Along with the borough of Houston the township makes up the Chartiers-Houston School District.-Geography:...
  
  
• Claysville
  Claysville, Pennsylvania
  Claysville is a borough in Washington County, Pennsylvania, United States. The population was 724 at the 2000 census. Claysville Elementary School, part of the McGuffey School District is located in Claysville....
  
  
• Cokeburg
  Cokeburg, Pennsylvania
  Cokeburg is a borough in Washington County, Pennsylvania, United States, founded in 1902. The population was 705 at the 2000 census.-Geography:Cokeburg is located at ....
  
  
• Cross Creek Township
  Cross Creek Township, Pennsylvania
  Cross Creek Township is a township in Washington County, Pennsylvania, United States. The population was 1,685 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , all of it land.-Demographics:...
  
  
• Deemston
  Deemston, Pennsylvania
  Deemston is a borough in Washington County, Pennsylvania, United States. The population was 809 at the 2000 census.-Geography:Deemston is located at ....
  
  
• Donegal Township
  Donegal Township, Washington County, Pennsylvania
  Donegal Township is a township in Washington County, Pennsylvania, United States. The population was 2,428 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , of which, of it is land and of it is water.-Demographics:As of the census of...
  
  
• Donora
  Donora, Pennsylvania
  Donora is a borough in Washington County, Pennsylvania, south of Pittsburgh on the Monongahela river. Donora was incorporated in 1901. Donora got its name from a combination of William Donner and Nora Mellon, banker Andrew W. Mellon's wife. Agriculture, coal-mining, steel-making, wire-making, and...
  
  
• East Bethlehem Township
  East Bethlehem Township, Pennsylvania
  East Bethlehem Township is a township in Washington County, Pennsylvania, United States. The population was 2,524 at the 2000 census. The township contains the Frederickstown-Millsboro census-designated place.-Geography:...
  
  
• East Finley Township
  East Finley Township, Pennsylvania
  East Finley Township is a township in Washington County, Pennsylvania, United States. The population was 1,489 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , all of it land.-Demographics:...
  
  
• East Washington
  East Washington, Pennsylvania
  East Washington is a borough in Washington County, Pennsylvania, United States. The population was 1,930 at the 2000 census.-Geography:East Washington is located at ....
  
  
• Ellsworth
  Ellsworth, Pennsylvania
  Ellsworth is a borough in Washington County, Pennsylvania, United States.-Geography:Ellsworth is located at .According to the United States Census Bureau, the borough has a total area of , of which, of it is land and of it is water.-Demographics:As of the census of 2000, there were 1,083...
  
  
• Fallowfield Township
  Fallowfield Township, Pennsylvania
  Fallowfield Township is a township in Washington County, Pennsylvania, United States. The population was 4,461 at the 2000 census.-Geography:...
  
  
• Finleyville
  Finleyville, Pennsylvania
  Finleyville is a borough in Washington County, Pennsylvania, United States, named for John Finley. It was built at the junction of Brownsville Road and the 'Washington Road' from Cox's Fort to Catfish Camp, now Washington, Pennsylvania...
  
  
• Green Hills
  Green Hills, Pennsylvania
  Green Hills is a borough in Washington County, Pennsylvania, United States. The population was 18 at the 2000 census, making it the third-least-populous borough in the state. Only S.N.P.J. and Centralia are smaller...
  
  
• Hanover Township
  Hanover Township, Washington County, Pennsylvania
  Hanover Township is a township in Washington County, Pennsylvania, United States. The population was 2,795 at the 2000 census. Hillman State Park, a Pennsylvania state park and the First Niagara Pavilion concert venue are located in Hanover Township....
  
  
• Hopewell Township
  Hopewell Township, Washington County, Pennsylvania
  Hopewell Township is a township in Washington County, Pennsylvania, United States. The population was 992 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , all of it land.-Demographics:...
  
  
• Houston
  Houston, Pennsylvania
  Houston is a borough in Washington County, Pennsylvania, United States. The population was 1,314 at the 2000 census.Students in Houston and neighboring Chartiers Township attend school in the Chartiers-Houston School District.-Geography:...
  
  
• Independence Township
  Independence Township, Washington County, Pennsylvania
  Independence Township is a township in Washington County, Pennsylvania, United States. The population was 1,676 at the 2000 census.-Geography:...
  
  
• Jefferson Township
  Jefferson Township, Washington County, Pennsylvania
  Jefferson Township is a township in Washington County, Pennsylvania, United States. The population was 1,218 at the 2000 census.-Geography:...
  
  
• Long Branch
  Long Branch, Pennsylvania
  Long Branch is a borough in Washington County, Pennsylvania, United States. The population was 539 at the 2000 census.-Geography:Long Branch is located at ....
  
  
• Marianna
  Marianna, Pennsylvania
  Marianna is a borough in Washington County, Pennsylvania, United States. The population was 626 at the 2000 census.-History:Marianna was built as a mining town for the Pittsburg Buffalo Company in 1907 and was incorporated in 1910. At the time of its construction, the Marianna Mine was among the...
  
  
• McDonald
  McDonald, Pennsylvania
  McDonald is a borough in Allegheny and Washington counties in the U.S. state of Pennsylvania, 18 miles southwest of Pittsburgh. In the past, manufactories of bottles, oil-well drilling tools, flour-mill products, etc., existed here. Oil and coal were and still are procured in the area...
  
  
• Midway
  Midway, Washington County, Pennsylvania
  Midway is a borough in Washington County, Pennsylvania, United States. The population was 982 at the 2000 census.-Geography:Midway is located at ....
  
  
• Monongahela
  Monongahela, Pennsylvania
  Monongahela, colloquially called "Mon City," is a Third Class City in Washington County, Pennsylvania, United States and is part of the Pittsburgh Metro Area, located approximately south of the city proper. The population was 4,761 at the 2000 census...
  
  
• Morris Township
  Morris Township, Washington County, Pennsylvania
  Morris Township is a township in Washington County, Pennsylvania, United States. The population was 1,272 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of 28.4 square miles , of which, 28.4 square miles of it is land and...
  
  
• Mount Pleasant Township
  Mount Pleasant Township, Washington County, Pennsylvania
  Mount Pleasant Township is a township in Washington County, Pennsylvania, in the United States. As of the 2000 census, the township population was 3,422.-Geography:...
  
  
• New Eagle
  New Eagle, Pennsylvania
  New Eagle is a borough in Washington County, Pennsylvania, United States and is part of the Pittsburgh Metro Area. The population was 2,262 at the 2000 census.-History:...
  
  
• North Bethlehem Township
  North Bethlehem Township, Pennsylvania
  North Bethlehem Township is a township in Washington County, Pennsylvania, United States. The population was 1,746 at the 2000 census. The residents of the township are part of the Bentworth School District with schools located in nearby Bentleyville and Ellsworth boroughs.-Geography:According to...
  
  
• North Charleroi
  North Charleroi, Pennsylvania
  North Charleroi is a borough in Washington County, Pennsylvania, United States. The population was 1,409 at the 2000 census.The city is also known as "Lock 4". Previously Lock and Dam #4 was located on this side of the Monongahela River, and the place had this name. Lock and Dam #4 was later...
  
  
• North Franklin Township
  North Franklin Township, Pennsylvania
  North Franklin Township is a township in Washington County, Pennsylvania, United States. The population was 4,818 at the 2000 census.-Geography:...
  
  
• North Strabane Township
  North Strabane Township, Pennsylvania
  North Strabane Township is a township in Washington County, Pennsylvania, United States. The population was 13,408 at the 2010 census. The township is named after the town of Strabane in County Tyrone, Northern Ireland. The township borders the borough of Canonsburg, Pennsylvania to the north...
  
  
• Nottingham Township
  Nottingham Township, Pennsylvania
  Nottingham Township is a township in Washington County, Pennsylvania, United States. The population was 2,522 in the 2000 census.-Geography:...
  
  
• Robinson Township
  Robinson Township, Washington County, Pennsylvania
  Robinson Township is a township in Washington County, Pennsylvania, United States. The population was 2,193 at the 2000 census. It was formerly an area of interest concerning coal mining...
  
  
• Smith Township
  Smith Township, Pennsylvania
  Smith Township is a township in Washington County, Pennsylvania, United States. As of the 2000 census, the township population was 4,567.-Geography:...
  
  
• Somerset Township
  Somerset Township, Washington County, Pennsylvania
  Somerset Township is a township in Washington County, Pennsylvania, United States. The population was 2,701 at the 2000 census.-Geography:...
  
  
• South Franklin Township
  South Franklin Township, Pennsylvania
  South Franklin Township is a township in Washington County, Pennsylvania, United States. The population was 3,796 at the 2000 census.-Geography:...
  
  
• South Strabane Township
  South Strabane Township, Pennsylvania
  South Strabane Township is a township in Washington County, Pennsylvania, United States. The population was 9,346 at the 2000 census. The township is named after the town of Strabane in County Tyrone, Northern Ireland.-Geography:...
  
  
• Twilight
  Twilight, Pennsylvania
  Twilight is a borough in Washington County, Pennsylvania, United States. The population was 241 at the 2000 census.-Geography:Twilight is located at ....
  
  
• Union Township
  Union Township, Washington County, Pennsylvania
  Union Township is a township in Washington County, Pennsylvania, United States. The population was 5,599 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of 15.7 square miles , of which, 15.4 square miles of it is land and...
  
  
• Washington
  Washington, Pennsylvania
  Washington is a city in and the county seat of Washington County, Pennsylvania, United States, within the Pittsburgh Metro Area in the southwestern part of the state...
  
  
• West Alexander
  West Alexander, Pennsylvania
  West Alexander is an unincorporated community in Washington County, Pennsylvania, United States. The population was 320 at the 2000 census, at which time it was a borough...
  
  
• West Bethlehem Township
  West Bethlehem Township, Pennsylvania
  West Bethlehem Township is a township in Washington County, Pennsylvania, United States. The population was 1,432 at the 2000 census.-Geography:...
  
  
• West Brownsville
  West Brownsville, Pennsylvania
  West Brownsville is a borough in Washington County, Pennsylvania, United States. The population was 1,075 at the 2000 census.-Geography:West Brownsville is located at ....
  
  
• West Finley Township
  West Finley Township, Pennsylvania
  West Finley Township is a township in Washington County, Pennsylvania, United States. The population was 951 at the 2000 census.-Geography:...
  
  
• West Middletown
  West Middletown, Pennsylvania
  West Middletown is a borough in Washington County, Pennsylvania, United States. The population was 144 at the 2000 census.-Geography:West Middletown is located at ....
  
  
• West Pike Run Township
  West Pike Run Township, Pennsylvania
  West Pike Run Township is a township in Washington County, Pennsylvania, United States. The population was 1,925 at the 2000 census.-Geography:...
  
  

• Monessen
  Monessen, Pennsylvania
  Monessen is a city in Westmoreland County, Pennsylvania, United States. The population was 8,669 at the 2000 census. In 1940, 20,257 people lived there. In 1990 the population was 13,026. Steel-making was a prominent industry in Monessen, which was a Rust Belt borough in the "Mon Valley" of...
  
  

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