Moon Township is a township along the Ohio River in Allegheny County, Pennsylvania, United States. Moon is a part of the Pittsburgh Metro Area and is located 12 miles (19 km) northwest of Pittsburgh. The origin of its name is unknown; historians suggest it was derived from a crescent-shaped bend in the river. Local lore tells of a waning crescent moon that descended to plow furrows in farmer's fields with its sharp cusp, but killed many excited witnesses who cursed and praised the moon's early morning activities.