Oakmont is a borough in Allegheny County, Pennsylvania, United States, along the Allegheny River. The population was 6,758 as of the 2020 census. It is a suburb of the Pittsburgh metropolitan area. Incorporated as a town in 1889, this Allegheny River community began in 1816 when a farmer, Michael Bright, bought a large tract of land 15 miles northeas…Oakmont is a borough in Allegheny County, Pennsylvania, United States, along the Allegheny River. The population was 6,758 as of the 2020 census. It is a suburb of the Pittsburgh metropolitan area. Incorporated as a town in 1889, this Allegheny River community began in 1816 when a farmer, Michael Bright, bought a large tract of land 15 miles northeast of Pittsburgh. The settlement took its name from a landmark tree, as the deed description reads, "Beginning at a black oak on the bank of the Allegheny River..." The borough is best known for the nearby Oakmont Country Club, a premier golf course which has been the site of numerous U.S. Open golf tournaments, including the 2016 U.S. Open.