Montgomery is a borough in Lycoming County, Pennsylvania, United States. The population was 1,570 at the 2020 census. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area. Montgomery was incorporated as a borough by the Court of Quarter Sessions of the Peace of Lycoming County, Pennsylvania on March 21, 1887, from part of C…Montgomery is a borough in Lycoming County, Pennsylvania, United States. The population was 1,570 at the 2020 census. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area. Montgomery was incorporated as a borough by the Court of Quarter Sessions of the Peace of Lycoming County, Pennsylvania on March 21, 1887, from part of Clinton Township. The history of the settlement of Montgomery begins in 1783 when John Lawson established a homestead there. Nicholas Shaffer built a gristmill in Montgomery in 1795. A sawmill and a wool carding mill were other early industries found on Black Hole Creek which flows through Montgomery.