Catasauqua, referred to colloquially as Catty, is a borough in Lehigh County, Pennsylvania, United States.

George Taylor, signer of the Declaration of Independence, built a Georgian stone house in 1768 in what is now Catasauqua.

[9] Welsh immigrant David Thomas relocated to the area and opened the Crane Iron Works.

The Catasauqua and Fogelsville Railroad existed to transport ore from limonite deposits to the plant.

Remembered as "the father of Catasauqua," Thomas initially named the community Craneville after his former employer in Wales.

Thomas organized Catasauqua's first fire company, installed its first public water system, and served as its first burgess.

By 1900, Catasauqua boasted 5,000 residents, and had the highest percentage of self-made millionaires of any town in the United States.

The original old home week marked the 75th anniversary of the town's Lehigh Crane Iron Company.

Catasauqua is home to two different neighborhoods listed on the National Register of Historic Places: Biery's Port, located along the Lehigh River and named for an early family of prominence, and a neighborhood known as "the mansion district," which includes Victorian homes once owned by wealthy Catasauqua residents.