1980 Custom Credit Australian Indoor Championships

The 1980 Custom Credit Australian Indoor Championships was a tennis tournament played on indoor hard courts at the Hordern Pavilion in Sydney, Australia and was part of the 1980 Volvo Grand Prix. It was the 8th edition of the tournament and was held from 13 October through 19 October 1980. First-seeded John McEnroe won the singles title and earned $46,250 first-prize money.

Singles
🇺🇸 John McEnroe defeated 🇺🇸 Vitas Gerulaitis 6–3, 6–4, 7–5
 * It was McEnroe's 6th singles title of the year and the 21st of his career.

Doubles
🇺🇸 Peter Fleming / 🇺🇸 John McEnroe defeated 🇺🇸 Tim Gullikson / Johan Kriek 4–6, 6–1, 6–2
 * It was Fleming's 6th title of the year and the 30th of his career. It was McEnroe's 12th title of the year and the 49th of his career.