The Marine Corps League is headed by an elected National Commandant, with 14 elected National Staff Officers who serve as trustees. The National Board of Trustees coordinates the efforts of 49 department, or state, entities and the activities of over 1100 community-based detachments located throughout the United States and overseas. The day-to-day operations of the League are under the control of the National Executive Director with the responsibility for the management and direction of all programs, activities, and affairs of the Marine Corps League as well as supervising the National Headquarters staff.
The prime authority of the League is derived from its Congressional charter and from its annual National Convention held each August in different major U.S. cities throughout the nation. It is a not-for-profit organization within the provisions of the Internal Revenue Service Code 501(c) (4), with a special group exemption letter which allows for contributions to the Marine Corps League, its Auxiliary and subsidiary units, to be tax deductible by the donor.