Elizabeth is a borough in Allegheny County, Pennsylvania, on the east bank of the Monongahela River, where Pennsylvania Route 51 crosses, 15 miles (24 km) upstream (south) of Pittsburgh and close to the county line. The population was 1,493 at the 2010 census. The borough of Elizabeth is entirely contained within the 15037 USPS ZIP code. The local school district is the Elizabeth Forward School District. The borough is home to neighborhoods Walker Heights and Town Hill. Elizabeth Borough is the birthplace of Town Hill Hockey established in 1978.
Elizabeth is located at 40°16′16″N 79°53′11″W (40.271189, -79.886347).
According to the United States Census Bureau, the borough has a total area of 0.4 square miles (1.0 km2), of which 0.3 square miles (0.78 km2) is land and 0.1 square miles (0.26 km2), or 14.63%, is water.
Elizabeth has two land borders with the townships of Elizabeth to the east and northeast, and Forward to the south and southeast. Across the Monongahela River, Elizabeth runs adjacent with West Elizabeth and Jefferson Hills, the former with a direct connector via Malady Bridge.
As of the census of 2000, there were 1,609 people, 681 households, and 422 families residing in the borough.