Jersey Shore is a borough in Lycoming County, Pennsylvania, United States. It is on the West Branch Susquehanna River, west by south of Williamsport. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area. In the past, Jersey Shore held farms, railroad shops, cigar factories, a foundry, and a large silk mill. In 1900, 3,070 people lived there; in 1910, 5,381; and in 1940, 5,432. The population was 4,482 at the 2000 census.