The 1983 Custom Credit Australian Indoor Championships was a men's tennis tournament played on indoor hard courts at the Sydney Entertainment Centre in Sydney in Australia and was part of the 1983 Volvo Grand Prix. It was the 11th edition of the tournament and was held from 10 October through 16 October 1983. Defending champion and top-seeded John McEnroe won his fourth successive singles title.
John McEnroe defeated Henri Leconte 6–1, 6–4, 7–5
- It was McEnroe's 9th title of the year and the 91st of his career.
Mark Edmondson / Sherwood Stewart defeated John McEnroe / Peter Rennert 6–2, 6–4
- It was Edmondson's 3rd title of the year and the 31st of his career. It was Stewart's 4th title of the year and the 46th of his career.