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is a borough in southern Armstrong County, Pennsylvania, United States, 35 miles (56 km) northeast of Pittsburgh. Leechburg was founded by David Leech, for whom it was later named, and was incorporated as a Borough in 1850.
Located along the Kiskiminetas River, Leechburg was known as a major port of the Pennsylvania Canal. Early in the twentieth century, it had been the site of extensive steel sheet works, foundries, cement plants, and productive coal mines. Leechburg was the first place where natural gas was used for industrial purposes.
Leechburg is located at (40.629304, -79.603727), and is 800 feet above sea level.
According to the United States Census Bureau, the borough has a total area of 0.5 square miles (1.3 km²), of which, 0.4 square miles (1.2 km²) of it is land and 0.04 square miles (0.1 km²) of it (8.16%) is water.
The town is bordered by the Kiskiminetas River to the south, on the border of Westmoreland County, and Gilpin Township to the north.