The Ottawa-Carleton District School Board (OCDSB, known as English-language Public District School Board No. 25 prior to 1999) refers to both the institution responsible for the operation of all English public schools in the city of Ottawa, Ontario and its governing body. Like most school boards, the OCDSB is typically administered by a group of elected trustees and one director selected and appointed by the Board itself. Additionally, annually, two student trustees are selected per provincial regulation.

Since 27 June, 2025, the OCDSB has been under provincial supervision. Its board of trustees is suspended and all decisions regularly made by trustees are made by the provincially appointed supervisor, Robert Plamondon. Student trustees are still elected as of March 2026.

When not in supervision, every four years, within the context of the Ottawa municipal elections, an election is held within each of Ottawa's twelve trustee electoral zones to elect each trustee. Following election and annually thereafter, the board of trustees holds its organizational meeting, where the Board membership elects two of its members to the positions of chair and vice-chair of the Board. Chairs and membership of each of the Board's committees are also determined as part of the organizational meeting. In addition to the twelve trustees, two student trustees are elected by their peers, providing opportunities for the student body to become informed and involved in Board governance.