For more than a century, the Principia Alumni Association has been welcoming new members into its ranks. Starting with six members in 1906—Principia's first graduating class—today's association numbers more than 20,000. Members include graduates of Principia School and/or Principia College, former students who attended at least one quarter, faculty and staff members who served a minimum of two years, and honorary alumni elected by the Board.
The Principia Alumni Association connects alumni, students, and friends to each other and to ongoing programs, scholarship opportunities, communications, and special events.
Members of the Alumni Association Board are regional volunteers for Principia who serve for three years, representing the interest of Principia's alumni around the world.