 According to the United States Census Bureau, Preston Township has a total area of 51.546 sq mi (133.51 km2), of which 49.419 sq mi (128.00 km2) is land and 2.127 sq mi (5.510 km2), or 4.126%, is water.The township and surrounding area has been called "the highlands of Wayne [County]" because it is especially mountainous.About half of the highest peak in the county, Mount Ararat (historically called Ararat Mountain, Ararat Peak, Ararat Summit, or simply "Ararat"), is located in the village of Orson (the other half of it is in Belmont Corners in Mount Pleasant Township), as is the entirety of Sugarloaf Mountain (formerly called Sugar Loaf Peak or Sugar-loaf Mountain), another especially prominent summit.