The Gasper River is a 38.6-mile-long (62.1 km) river in southwestern Kentucky, USA. It flows northeasterly into the Barren River. It is a rural river; the only town near it is Hadley in Warren County. It begins in northeast Logan County, and the river also flows through Warren and Logan counties. Tributaries include Belcher, Salt Lick, Brush, Clear Fork, Westbrook, and Rock House creeks.