Bainbridge is an unincorporated community and census-designated place in Conoy Township, Lancaster County, Pennsylvania, United States, with a ZIP code of 17502. Bainbridge is located along Pennsylvania Route 441. As of the 2010 census, the population was 1,355.Before European settlement, Bainbridge was the site of a Conoy village in the first decades of the 18th century, possibly called Conejoholo.