The Supermarine Slipway is a concrete slipway dating from around 1936–37, designed by architect Oliver Bernard. It sits on the River Itchen near Woolston, Southampton, and is the last surviving physical remnant of the historic Supermarine Aviation Works.

Listed at Grade II, the slipway holds considerable historical significance as a tangible link to the Supermarine company, which developed some of Britain's most important flying boats. It is also closely associated with R. J.

Mitchell, Supermarine's chief designer and the man behind the legendary Supermarine Spitfire.

Structurally, the slipway consists of a platform of pre-cast, likely reinforced, concrete slabs — originally topped with tarmac, of which only patches remain — supported by concrete beams that extend down to the water's edge.