[1] Comprende los condados de Allegheny, Armstrong, Beaver, Butler, Fayette, Washington y Westmoreland, siendo Pittsburgh la ciudad más poblada.
[3] Según el censo de 2020, hay 2 370 930 personas residiendo en el área metropolitana.
[4] Aleppo | Baldwin | Collier | Crescent | East Deer | Elizabeth | Fawn | Findlay | Forward | Frazer | Hampton | Harmar | Harrison | Indiana | Kennedy | Kilbuck | Leet | Marshall | McCandless | Moon | Mt. Lebanon | Neville | North Fayette | North Versailles | O'Hara | Ohio | Penn Hills | Pine | Reserve | Richland | Robinson | Ross | Scott | Shaler | South Fayette | South Park | South Versailles | Springdale | Stowe | Upper St.
Clair | West Deer | Wilkins Bethel | Boggs | Bradys Bend | Burrell | Cadogan | Cowanshannock | East Franklin | Gilpin | Hovey | Kiskiminetas | Kittanning | Madison | Mahoning | Manor | North Buffalo | Parks | Perry | Pine | Plumcreek | Rayburn | Redbank | South Bend | South Buffalo | Sugarcreek | Valley | Washington | Wayne | West Franklin Brighton | Center | Chippewa | Darlington | Daugherty | Franklin | Greene | Hanover | Harmony | Hopewell | Independence | Marion | New Sewickley | North Sewickley | Patterson | Potter | Pulaski | Raccoon | Rochester | South Beaver | Vanport | White Adams | Allegheny | Brady | Buffalo | Butler | Center | Cherry | Clay | Clearfield | Clinton | Concord | Connoquenessing | Cranberry | Donegal | Fairview | Forward | Franklin | Jackson | Jefferson | Lancaster | Marion | Mercer | Middlesex | Muddy Creek | Oakland | Parker | Penn | Slippery Rock | Summit | Venango | Washington | Winfield | Worth Brownsville| Bullskin| Connellsville| Dunbar| Franklin| Georges| German| Henry Clay| Jefferson| Lower Tyrone| Luzerne| Menallen| Nicholson| North Union| Perry| Redstone| Saltlick| South Union| Springfield| Springhill| Stewart| Upper Tyrone| Washington| Wharton Amwell | Blaine | Buffalo | Canton | Carroll | Cecil | Chartiers | Cross Creek | Donegal | East Bethlehem | East Finley | Fallowfield | Hanover | Hopewell | Independence | Jefferson | Morris | Mount Pleasant | North Bethlehem | North Franklin | North Strabane | Nottingham | Peters | Robinson | Smith | Somerset | South Franklin | South Strabane | Union | West Bethlehem | West Finley | West Pike Run Allegheny | Bell | Cook | Derry | Donegal | East Huntingdon | Fairfield | Hempfield | Ligonier | Loyalhanna | Mount Pleasant | North Huntingdon | Penn | Rostraver | St.
Clair | Salem | Sewickley | South Huntingdon | Unity | Upper Burrell | Washington