 It is part of Pennsylvania's Slate Belt.The population of Lower Mount Bethel Township was 3,228 at the 2000 census.According to the United States Census Bureau, the township has a total area of 24.7 square miles (63.9 km2), of which 24.2 square miles (62.7 km2) is land and 0.5 square miles (1.2 km2) (1.95%) is water.