San Juan Diego Middle School was founded by a group of laypeople, led by educator Michael Frontier. The group sought partnership with the Christian Brothers de Lasalle and the Racine Dominicans to create a Catholic school that would provide a quality education to under-served children of the Racine community.
San Juan Diego Middle School opened its doors in 2003 as a nonprofit, Catholic school that exists nearly completely on contributions from funding organizations, corporations and individual donors.