PRR 4859 is a GG1-class electric locomotive located in the Harrisburg Transportation Center in Harrisburg in the U.S. state of Pennsylvania. It was operated by the Pennsylvania Railroad and its successors, Penn Central and Conrail. 4859 pulled the first electrically powered train from Philadelphia to Harrisburg on January 15, 1938. It was used in various freight and passenger service until November 22, 1979, when it pulled the last GG1-powered freight train on November 22, 1979.