Waterproof is a town in Tensas Parish, Louisiana, United States with a population of 834 as of 2000 census. Waterproof is approximately seventeen miles north of Ferriday, one of the two principal communities of Concordia Parish. The town is named for its relative safety from flooding prior to construction of the Mississippi River levee system.
Poverty abounds in Waterproof, a delta town dependent on farming. Cotton is the most common crop, but corn and soybeans are also important. In 2008, drought destroyed much of the corn crop.