The Little Hocking River is a small tributary of the Ohio River, 18.4mi long, in southeastern Ohio in the United States. Via the Ohio River, it is part of the watershed of the Mississippi River, draining an area of 102sqmi on the unglaciated portion of the Allegheny Plateau. The river flows for its entire length in southwestern Washington County; its tributaries also drain a small area of southeastern Athens County.The Little Hocking River rises in Fairfield Township between the communities of Barlow and Bartlett and initially flows southeastward through southwestern Barlow Township into Dunham Township, where it is dammed to form Veto Lake, which is surrounded by the 160acre Veto Lake State Wildlife Area. Downstream of Veto Lake, the river flows southwestward into Belpre Township; near its mouth it turns eastward and flows into the Ohio River at the community of Little Hocking.