The Illawarra Open was a professional golf tournament played in the Illawarra area of New South Wales, Australia. It was played between 1978 and 1981. 1978 and 1979 events had prize money of A$20,000. The 1981 event was played over 36 holes with reduced prize money of A$10,000 and was not a PGA Tour of Australia Order of Merit event. The 1982 event had prize money of A$25,000.
The 1978 tournament was planned as a 72-hole event. 18 holes were played on the Thursday and Friday but heavy rain at the weekend caused the tournament to be reduced to 36 holes.
| Year | Winner | Country | Venue | Score | To par | Margin of victory | Runner(s)-up | Ref |
|---|---|---|---|---|---|---|---|---|
| Tooth's Illawarra Open | ||||||||
| 1982 | Bob Shaw |  Australia | Port Kembla | 277 | −11 | 1 stroke | Colin Bishop | |
| 1981 | George Serhan | Australia | Port Kembla | 142 | −2 | Playoff | John Clifford Garry Doolan | |
| Illawarra Open | ||||||||
| 1979 | Mike Ferguson | Australia | The Grange | 288 | E | 1 stroke | Tom Linskey Chris Tickner | |
| 1978 | Bill Dunk | Australia | Wollongong | 135 | −5 | 1 stroke | Colin McGregor | |