Counties in Pennsylvania

Counties in Pennsylvania
Name	Counties of Pennsylvania
Caption	Map of Pennsylvania counties
Established	1682–1810
Number	67
Largest by area	Lycoming County
Largest by population	Philadelphia County
Smallest by area	Montgomery County

Contents

Counties in Pennsylvania Pennsylvania is divided into 67 counties that function as primary substate divisions, with roots in colonial charters like the Province of Pennsylvania and legal frameworks such as the Pennsylvania Constitution. These counties encompass major municipalities including Philadelphia, Pittsburgh, Harrisburg, and Allentown, and interact with federal entities like the United States Census Bureau and judicial bodies including the United States District Court for the Western District of Pennsylvania. County boundaries and roles evolved through treaties such as the Treaty of Fort Stanwix and events like the French and Indian War.

History

County formation began under provincial authorities like William Penn and the Quaker leadership, with early counties including Chester County, Pennsylvania and Philadelphia County, Pennsylvania. Expansion during westward settlement followed routes used in conflicts like the American Revolutionary War and surveys by figures associated with the Mason–Dixon Line and the Pennsylvania Land Office. Legislative acts by the Pennsylvania General Assembly and judicial rulings from the Supreme Court of Pennsylvania shaped county powers, while industrialization tied counties to corporations such as the Pennsylvania Railroad and events like the Battle of Gettysburg influenced municipal development. County reorganization in the 19th century referenced federal measures like the Homestead Act indirectly through migration patterns and was affected by infrastructure projects including the Erie Canal.

Pennsylvania counties span physiographic provinces including the Pocono Mountains, the Allegheny Plateau, the Delaware River basin, and the Susquehanna River watershed, hosting urban centers like Scranton and rural townships such as those around Bradford County, Pennsylvania. Population concentrations follow corridors served by transit systems including SEPTA and Port Authority of Allegheny County, while demographic patterns are tracked by the United States Census Bureau and influenced by immigration waves associated with ports like Philadelphia Port and industries such as the Steel industry in Pittsburgh. Counties contain protected lands including Valley Forge National Historical Park and infrastructure nodes like Pittsburgh International Airport and Harrisburg International Airport.

County governance operates under the Pennsylvania Constitution and statutes enacted by the Pennsylvania General Assembly, with elected officials including county commissioners, sheriffs, and judges who may interact with the Pennsylvania Supreme Court and the United States Court of Appeals for the Third Circuit. Administrative responsibilities encompass record-keeping with offices similar to those in Philadelphia County, Pennsylvania and service delivery tied to agencies like the Pennsylvania Department of Transportation and institutions such as Pennsylvania State University extension programs. Fiscal management references interactions with federal programs like those of the Internal Revenue Service and funding mechanisms influenced by legislation such as the Social Security Act.

Economic profiles vary from energy production in counties with Marcellus Shale development to manufacturing legacies tied to the Carnegie Steel Company and trade facilitated through ports like Port of Philadelphia. Agriculture persists in counties surrounding Lancaster County, Pennsylvania with market connections to food companies such as Hershey Company and distribution networks including Amtrak and freight carriers like CSX Transportation. Infrastructure investments involve state agencies such as PennDOT and federal programs like the Federal Highway Administration, while technology and healthcare hubs link counties to institutions including University of Pennsylvania and UPMC.

Political dynamics range from urban strongholds in Philadelphia and Allegheny County, Pennsylvania to swing regions in Berks County, Pennsylvania and Monroe County, Pennsylvania, with electoral contests influenced by parties like the Democratic Party and the Republican Party. Law enforcement coordination includes county sheriffs and district attorneys who engage with federal law enforcement agencies like the Federal Bureau of Investigation and state police such as the Pennsylvania State Police. Judicial administration is connected to trial courts and appellate review by bodies such as the Supreme Court of Pennsylvania, and local ordinances interact with state statutes enacted by the Pennsylvania General Assembly.