Market Street, originally known as High Street, is a major east–west street

Street

A street is a paved public thoroughfare in a built environment. It is a public parcel of land adjoining buildings in an urban context, on which people may freely assemble, interact, and move about. A street can be as simple as a level patch of dirt, but is more often paved with a hard, durable...

 in Philadelphia, Pennsylvania

Philadelphia, Pennsylvania

Philadelphia is the largest city in the Commonwealth of Pennsylvania and the county seat of Philadelphia County, with which it is coterminous. The city is located in the Northeastern United States along the Delaware and Schuylkill rivers. It is the fifth-most-populous city in the United States,...

. For the majority of its length, it serves as Pennsylvania Route 3

Pennsylvania Route 3

Pennsylvania Route 3 is a state highway located in the southeastern portion of Pennsylvania. The route connects West Chester with Philadelphia. The divided highway that comprises much of its route is the West Chester Pike, built as a turnpike by the Philadelphia and West Chester Turnpike Company...

.

The High Street was the familiar name of the principal street in nearly every English town at the time Philadelphia was founded. But if Philadelphia was indebted to England for the name of High Street, nearly every American town is, in turn, indebted to Philadelphia for its Market Street.