The Indiana State Fair Band Day is a marching band competition held at the Indiana State Fair in Indianapolis every August.

The contest serves as the championship for the Central Indiana Track Show Association, an organization that governs high school track show marching band contests in Indiana each summer.

First held in 1947, it is one of, if not the oldest, high school marching band contest in the United States.

The 77th Indiana State Fair Band Day competition was held on 2 August 2024.

The 16 top scoring bands, regardless of class, compete in the finals competition that night.