The Board of Trustees is responsible for managing the affairs of the School. However, consistent with the tradition of independent schools, the functions of the Board of Trustees are somewhat more circumscribed than those of boards of public, parochial, or stockholder-owned private schools. The essence of the governing principles of St. Andrew's Episcopal School is that, except through the setting and monitoring of policy, the Board of Trustees does not become involved in the selection, evaluation, or dismissal of faculty, staff, or students. Neither does the Board intervene in the daily operation of the School nor serve as an appellate review body of the administrative decisions of the Head of School or other administrators.
The Board of Trustees of St. Andrew's Episcopal School consists of twenty-three people elected to serve four-year staggered terms, including three ex-officio members: the chair and chair-elect of the St. Andrew's Parents' Association and the Dean of St. Andrew's Cathedral. Regular meetings of the Board of Trustees are held during the academic year.