The Ginetta GT4 Supercup is a one-make racing, Sports car racing series based in the United Kingdom, using identical Ginetta G50 and G55 sports cars. The championship supported the British Touring Car Championship (BTCC) until the end of the 2022 season, then became a class in the British Endurance Championship run by Britcar.

Ginetta Cars Limited is a British specialist builder of racing and sports cars based in Garforth, Leeds, West Yorkshire.