Lehigh County

Lehigh County (Pennsylvania Dutch: Lechaa Kaundi) is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the county's population was 374,557. Its county seat is Allentown, the state's third-largest city after Philadelphia and Pittsburgh.

Lehigh County and Northampton County to its east combine to form the Lehigh Valley region of eastern Pennsylvania. Lehigh County is one of the fastest-growing counties in Pennsylvania and the more highly populated of the two counties. Both counties are part of the Philadelphia television market, the fourth-largest television market in the nation.

The county is named for the Lehigh River, a 109-mile-long (175 km) tributary of the Delaware River, which flows through Lehigh County. The Lehigh River served a vital role in the county's development by offering a transportation and trading route for its mining products, including iron, manganese, limestone, and ultimately manufactured steel products.

Lehigh County falls geographically between two Pennsylvania Appalachian mountain ridges, Blue Mountain to the county's north and South Mountain to its south. Lehigh County borders Montgomery County to its south, Bucks County to its southeast, Northampton County to its east, Carbon County to its north, Schuylkill County to its northwest, and Berks County to its southwest.

The county is located 61 miles (98 km) northwest of Philadelphia and 99 miles (159 km) west of New York City.

Alburtis is a borough in Lehigh County, Pennsylvania. It is a suburb of Allentown, Pennsylvania, in the Lehigh Valley region of the state.

Allentown is a city located in Lehigh County, Pennsylvania. It is Pennsylvania's third most populous city, after Philadelphia and Pittsburgh.

Catasauqua is a borough in Lehigh County, Pennsylvania, settled in 1805 and chartered as a borough in 1853. Catasauqua is a suburb of Allentown, Pennsylvania in the Lehigh Valley region of the state.

Coopersburg is a borough in Lehigh County, Pennsylvania. It is a suburb of Allentown in the Lehigh Valley region of the state.

Coplay is a borough in Lehigh County, Pennsylvania, six miles (10 km) northwest of Allentown where the Lehigh Coal and Navigation Canal once existed. It is part of the Lehigh Valley region of the state.

Emmaus is a borough in Lehigh County, Pennsylvania. It is located five miles southwest of Allentown, Pennsylvania, in the Lehigh Valley region of the state.

Fountain Hill is a borough in Lehigh County, Pennsylvania. It is a suburb of Bethlehem, Pennsylvania in the Lehigh Valley region of the state.

Hanover Township is a township in Lehigh County, Pennsylvania. Hanover Township is a suburb of Allentown, Pennsylvania, in the Lehigh Valley region of the state.

Heidelberg Township is a township in Lehigh County, Pennsylvania. It is a suburb of Allentown, Pennsylvania, in the Lehigh Valley region of the state. Primarily devoted to agriculture and small family-owned farms.

Lower Macungie Township is a township in Lehigh County, Pennsylvania. It is a suburb of Allentown, Pennsylvania, in the Lehigh Valley region of the state.

Lower Milford Township is a township in Lehigh County, Pennsylvania. It is a suburb of Allentown, Pennsylvania, in the Lehigh Valley region of the state.

Lowhill Township is a township in Lehigh County, Pennsylvania. It is a suburb of Allentown, Pennsylvania, in the Lehigh Valley region of the state.

Lynn Township is a township in Lehigh County, Pennsylvania. It is a suburb of Allentown, Pennsylvania, in the Lehigh Valley region of the state. It is the most rural and least densely-populated township in the county.

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