Washington Catholic High School is a private, Roman Catholic high school located adjacent to the courthouse square in Washington, Indiana. It is a part of the Roman Catholic Diocese of Evansville. It is part of a larger school system that was founded by Mother Theodore Guerin in 1857. Until recently, it was under the care of the Sisters of Providence of Saint Mary-of-the-Woods.
The school's athletic nickname is the "Cardinals", and it participates in the Blue Chip Conference.