The 1984 Louisiana World Exposition was a World's Fair held in New Orleans, Louisiana in 1984. It was held 100 years after the city's earlier World's Fair, the World Cotton Centennial in 1884.

Plagued with attendance problems, the 1984 Louisiana World Exposition has the distinction of being the only exposition that has declared bankruptcy during its run. Many blamed the low attendance on the fact that it was staged just two years after Knoxville's 1982 World's Fair just two states away.

Despite its problems, it is fondly remembered by many New Orleans residents and noteworthy architecturally for the groundbreaking post-modern Wonderwall designed by Charles Moore and William Turnball .

The Fair was held along the Mississippi River front of the New Orleans Central Business District, much of it on land that was formerly a railroad yard. While the Fair itself was a financial failure, it did much to help revitalize the nearby Old Warehouse District. The "Riverwalk" Mall and Building 1 of the Morial Convention Center were originally part of the structures built for the Fair.