Aliquippa is a city in Beaver County, Pennsylvania, United States and is part of the Pittsburgh Metro Area. The city was founded via the merger of three pre-existing towns, Aliquippa, Woodlawn, and New Sheffield. There is no historical evidence connecting the Seneca Queen Alliquippa with the location of the borough. This was one of several Indian names selected arbitrarily by the Pittsburgh and Lake Erie Railroad in 1878 for stations along the route. The population was 11,734 at the 2000 census. Aliquippa is best known as the location of a productive steel mill that J & L Steel constructed there along the Ohio River beginning in 1905. Employment at the facility sustained a population of 27,023 in 1940. The mill closed during the collapse of the steel industry during the 1980s. This major economic loss alongside suburbanization caused a major population loss through the end of the 20th century. Aliquippa apartments for rent comparison page shows most up to date rent information on Aliquippa apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.