Brackenridge is a borough in Allegheny County in the U.S. state of Pennsylvania, along the Allegheny River. It is part of the Pittsburgh Metro Area.
The town is named for Henry Marie Brackenridge. The borough once had glass factories. An Allegheny Technologies steel mill, Allegheny Ludlum Brackenridge Works, plays a prominent role in the community, although most of the facility is located in Harrison Township. The population stood at 3,421 in 1910 and at 6,400 in 1940. The population was 3,260 at the 2010 census.
Brackenridge is located at 40°36′30″N 79°44′32″W. The borough's average elevation is 827 feet (252 m) above sea level.
According to the United States Census Bureau, the borough has a total area of 0.6 square miles (1.6 km2), of which 0.5 square miles (1.3 km2) is land and 0.04 square miles (0.10 km2), or 7.27%, is water.
Brackenridge is bordered by Tarentum to the west and Harrison Township to the north and east. The Allegheny River forms the southern border.