Waterproof is a village in Tensas Parish in northeastern Louisiana, United States with a population of 541 as of the 2020 census. The village in 2010 was 91.7 percent African American. Some 24 percent of Waterproof residents in 2010 were aged sixty or above. Waterproof is approximately 17 mi north of Ferriday, one of the two principal communities of Concordia Parish. The village is named for its relative safety from flooding prior to construction of the Mississippi River levee system.