Waterproof High School was a public secondary school in the small rural town of Waterproof, Tensas Parish, Louisiana, along the Mississippi River. It served local students from the early 20th century until its closure in the late 1990s due to declining enrollment and parish-wide school consolidations.

The school’s historic two-story brick building was constructed in 1926–1927 in the Classical Revival style at a cost of about $56,000. It consolidated several earlier frame schoolhouses into a modern facility featuring 14 classrooms, a large study hall, and specialized rooms for chemistry and home economics. The building opened in January 1927 with 188 students.

A highlight of the school’s athletic history came in 1943, when the football team won the Louisiana High School Athletic Association Class B state championship.

After closure, the building was leased to the Town of Waterproof for 50 years. In 2002 it was added to the National Register of Historic Places for its architectural and educational significance. The structure still stands on Main Street today, though it requires ongoing preservation efforts. ~ Grokpedia