is a borough in Cumberland County, Pennsylvania, United States. Lemoyne was incorporated as a borough on May 23, 1905. As of the 2000 census, the borough population was 3,995. It was formerly named Bridgeport. Lemoyne lies across the Susquehanna River from Harrisburg, Pennsylvania's capital. It is also part of the Harrisburg–Carlisle Metropolitan Statistical Area.
Lemoyne is served by Interstate 83 and U.S. Route 11/15.
According to the United States Census Bureau, the borough has a total area of 1.6 square miles (4.0 km²), all of it land.