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The state of Pennsylvania is quite varied and is a state in the Middle Atlantic region of the United States. Explore the Piedmont Plateau, the Ridge and Valley region, and the Allegheny Plateau.

Featured Article: Geography of Pittsburgh

Pittsburgh, Pennsylvania, the second largest city in the state and the seat of Allegheny County. See more »

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Geography of Pennsylvania

Pennsylvania, one of the eastern states of the United States. It is bordered by New York, New Jersey, Delaware, Maryland, West Virginia, and Ohio.

Geography of Philadelphia

Philadelphia, Pennsylvania, the largest city in the state and one of the largest in the United States.

Geography of Pittsburgh

Pittsburgh, Pennsylvania, the second largest city in the state and the seat of Allegheny County.

Geography of Allentown

Allentown, Pennsylvania, the seat of Lehigh County. It is on the Lehigh River, about 45 miles (72 km) north-northwest of Philadelphia.

Geography of Altoona

Altoona, Pennsylvania, a city in Blair County. It is in the Allegheny Mountains in the south-central part of the state.

Geography of Bethlehem

Bethlehem, Pennsylvania, a city in Northampton and Lehigh counties. It is on the Lehigh River, about 50 miles (80 km) northwest of Philadelphia.

Geography of Carlisle

Carlisle, Pennsylvania, the seat of Cumberland County. It lies in a rich agricultural region on the Pennsylvania Turnpike, 18 miles (29 km) west of Harrisburg.

Geography of Chester

Chester, Pennsylvania, a port city in Delaware County. It is on the Delaware River near Philadelphia, in the southeastern part of the state.

Geography of Easton

Easton, Pennsylvania, the seat of Northampton County. It is at the junction of the Delaware and Lehigh rivers, opposite Phillipsburg, New Jersey.

Geography of Erie

Erie, Pennsylvania, the seat of Erie County. It is on Lake Erie, in the northwestern part of the state, 80 miles (129 km) southwest of Buffalo, New York.

Geography of Harrisburg

Harrisburg, Pennsylvania, the state capital and the seat of Dauphin County. It is on the Susquehanna River in south-central Pennsylvania, 93 miles (150 km) west-northwest of downtown Philadelphia.

Geography of Hazleton

Hazleton, Pennsylvania, a city in Luzerne County. It is near the Pocono Mountains, in the northeastern part of the state.

Geography of Johnstown

Johnstown, Pennsylvania, a city in Cambria County. It is in the Allegheny Mountains, on the Conemaugh River, about 60 miles (97 km) east-southeast of Pittsburgh.

Geography of Lancaster

Lancaster, Pennsylvania, the seat of Lancaster County. It is on the Conestoga River in the southeastern part of the state.

Geography of McKeesport

McKeesport, Pennsylvania, a city in Allegheny County. It lies in hilly terrain at the junction of the Monongahela and Youghiogheny rivers near Pittsburgh in the southwestern part of the state.

New Castle, near Wilmington, was Delaware's colonial capital. Surrounding the public square, laid out in 1650, are several private homes and public buildings that are notable examples of 17th- and 18th-century architecture.