Southbridge is governed by the Southbridge Community Association, which retains Cardinal Management Group as its on-site property manager. Residents are represented on the Southbridge Community Association by a nine-member Board of Directors. Each year, three directors are elected to a three-year term on the board. In the event that a vacancy occurs before the expiration of a director's term, an individual is appointed by the remaining directors to fill the seat until the next association annual meeting at which time an election is held for the remainder of the unexpired term.