Five members of the Stillwater Medical Center Authority are appointed by the City Commission as provided for in the Trust Indenture. One member is nominated by the hospital medical staff and is subject to the approval of the City Commission. The Mayor serves by virtue of the office. Five of the Trustees shall be citizens and residents of the City of Stillwater, Oklahoma and two shall be citizens and reside within a 15 mile radius of the primary health care facility of the Stillwater Medical Center Authority. Term length: 3 years. Meetings are held the fourth Tuesday of the month at 7:00 p.m. at the Stillwater Medical Center.

The governing board, as guardian of the hospital's assets and resources, establishes the overall purpose and direction for the organization and oversees its operation to help ensure achievement of that purpose. While board involvement with specific issues and decisions varies at different times in the governance cycle, key governance responsibilities can be grouped into five broad areas: mission development and long-range planning; ensuring high-quality care; oversight of medical staff credentialing; financial oversight; board education and development, including self-evaluation. These five areas, together with selection and evaluation of the hospital CEO, comprise the board's major responsibilities.