Beacon Falls is a town in New Haven County, Connecticut, United States. The population was 5,246 at the 2000 census. Beacon Falls has a Metro North railroad station on the Waterbury branch of the New Haven line. Settlers from Derby, Connecticut settled Beacon Falls in 1678. The town was incorporated in 1871 on lands carved from the neighboring towns of Bethany, Seymour, Naugatuck and Oxford.