San Diego Academy is a private, coeducational K-12 Christian school in National City, California. It is a part of the Seventh-day Adventist education system, the world's second largest Christian school system. As set forth in its constitution and bylaws, San Diego Academy is governed by a Board of Trustees composed of pastors and elected lay people of the constituent Seventh-day Adventist churches, parents, and alumni. The school operates under the auspices of the Southeastern California Conference of Seventh-day Adventists Office of Education.