North Braddock is a borough in Allegheny County, Pennsylvania, United States, along the Monongahela River. The 2020 census had the borough population at 4,320. It is a suburb 11 miles east of Pittsburgh. Organized from a part of Braddock Township in 1897, the borough prides itself in being the "Birthplace of Steel" as the home of Andrew Carnegie's Edgar Thomson Steel Works that opened in 1875.