Sunday Creek is a tributary of the Hocking River, 27.2 miles (43.8 km) long, in southeastern Ohio in the United States. Via the Hocking and Ohio Rivers, it is part of the watershed of the Mississippi River, draining 139 square miles (360 km²) in a mainly rural area of the Allegheny Plateau region. Its name is locally said to derive from early white settlers who in 1802 reached the creek on a Sunday, and so named it after the day of their discovery.