The 1985 South Australian Open was a men's Grand Prix tennis tournament held in Adelaide, Australia, on outdoor grass courts.

The tournament took place from 16 to 22 December, with unseeded qualifier Eddie Edwards claiming the singles title.

[3] Eddie Edwards defeated Peter Doohan 6–2, 6–4 Mark Edmondson / Kim Warwick defeated Nelson Aerts / Tomm Warneke 6–4, 6–4