West Homestead is a borough in Allegheny County, Pennsylvania, United States, 8 miles southeast of Pittsburgh, on the Monongahela River. Heavy industries associated with nearby steel mills existed here, such as axle works, brickworks, and manufactories of machinery, car wheels, etc. The largest concern was Mesta Machinery, which was one of the world's leading industrial manufacturers from 1898 until 1983. The population was 1,872 at the 2020 census.