Mossel Bay Yacht and Boat Club (MBYBC) is a sailing and boating club situated at Quay 4 in the Port of Mossel Bay, on the Garden Route in South Africa's Western Cape Province.

Founded in 1956 as the Mossel Bay Yacht Club following a meeting of local boating enthusiasts, it was established to give recreational sailors ready access to sailing and social facilities, including a purpose-built launching ramp.

The club's name was expanded in 1976 to reflect growing interest in deep-sea angling. Activities have historically encompassed yachting, boating, diving, rowing, and social events, with a membership of around 640.

The club maintains a close relationship with the harbour administration, consistent with its founding principles.