1983 Australian GT Championship

The 1983 Australian GT Championship was a CAMS sanctioned Australian motor racing title for cars complying with Group D regulations for GT cars, with Group B Sports Sedans competing by invitation. It was the sixth Australian GT Championship. The championship was won by Rusty French, driving a Porsche 935.

1982 Australian GT Championship winner Alan Jones moved back to Formula One in 1983 and did not defend his title. His main opposition from 1982 returned, including, Rusty French in the ex-Jones Porsche 935 sponsored by John Sands, along with new team-mate Alan Browne in the ex-French 935. Twice former Australian Sports Sedan Champion Tony Edmondson fronted again in the Don Elliot owned, 5.0L Chevrolet powered, Alfa Romeo Alfetta GTV (upgraded to a 6.0L Chev during the year), while touring car driver Peter Brock again was to drive the Bob Jane owned 6.0L Chevrolet Monza. Also competing were the Frank Gardner run JPS Team BMW with Jim Richards driving the team's turbocharged BMW 318i that had originally been driven by Allan Grice, Adelaide based John Briggs who had sold his Monza and was running an ex-JPS BMW 318i, and Peter Fitzgerald in his 3.2L Naturally aspirated Porsche Carrera RSR. The expected challenge from the twin-turbo Chevrolet V8 powered Mercedes-Benz 450 SLC of Bryan Thompson failed to eventuate until late in the series as the car was plagued by unreliability.