Clubs and organizations are offered at the Academy to help students learn to manage their time, make new friends, develop leadership skills, practice teamwork and make positive contributions to the campus community. Among the campus organizations offered at San Marcos Academy Texas boarding school are National Honor Society and National Junior Honor Society, Student Council, Fellowship of Christian Athletes, Student Ambassadors and the LEO Club.
A highly active Junior ROTC unit has been a feature of Academy life since 1917. The Academy’s Junior ROTC Program has been designated an “Honor Unit With Distinction,” the highest rating available to a JROTC unit. Participation in one semester of Junior ROTC is a graduation requirement for upper school boys who are U.S. citizens. However, all upper school students are encouraged to enroll in the program at any time.