Turtle Creek is a  tributary of the Monongahela River in Allegheny and Westmoreland counties in the U.S. state of Pennsylvania. At its juncture with the Monongahela is Braddock, Pennsylvania, where the Battle of the Monongahela ("Braddock's Defeat") was fought in 1755. In the mid-19th century, the Pennsylvania Railroad laid tracks along the stream as part of its Main Line from Philadelphia to Pittsburgh.

Turtle Creek is a borough in Allegheny County, Pennsylvania, southeast of Pittsburgh. The population was 5,349 at the 2010 census. George Westinghouse gave life to the place by constructing a manufacturing plant nearby. Turtle Creek takes its name from a small stream that flows into the Monongahela River. Before white settlers arrived, there was a small village of Native Americans living there from the Turtle Clan of the Iroquois Nation. (See: East Pittsburgh and Wilmerding.)