Archbishop Walsh Academy is a private, Roman Catholic high school in Olean, New York.

It is a college preparatory, co-ed, day school, serving students from both New York Pennsylvania.

Archbishop Walsh was established in 1958 and is the only Catholic high school in Western New York south of Cattaraugus Creek.

[1] Constructed at the height of the Cold War, the building's foundation included a fall out shelter for students and faculty in the event nuclear war found its way to the Enchanted Mountains.

Students began a tradition of signing their names in paint on the shelter's walls to memorialize their experience at the school.Walsh had a rich history in basketball.