San Juan Diego Catholic High School (SJDCHS) is a private, Roman Catholic high school in Austin, Texas.

In August 2002, Archbishop Gregory M. Aymond opened San Juan Diego Catholic High School.

San Juan Diego is modeled after Cristo Rey Jesuit High School in Chicago.

Each student at San Juan Diego works toward a Distinguished Achievement diploma,[1] which includes 30 credits and 80 hours of community service.

The school is located on the campus of San Jose Catholic Church in central Austin, near the intersection of Oltorf and South First Streets.