The 1938 Australian Championships was a tennis tournament that took place on outdoor Grass courts at the Memorial Drive, Adelaide, Australia from 21 January to 31 January. It was the 31st edition of the Australian Championships (now known as the Australian Open), the 7th held in Adelaide, and the first Grand Slam tournament of the year. The singles titles were won by Americans Don Budge and Dorothy Bundy Cheney.
| 1938 Australian Championships | |
|---|---|
| Date | 21–31 January 1938 |
| Edition | 31st |
| Category | Grand Slam (ITF) |
| Surface | Grass |
| Location | Adelaide, Australia |
| Venue | Memorial Drive |
| Champions | |
| Men's singles | |
 Don Budge | |
| Women's singles | |
| Dorothy Bundy | |
| Men's doubles | |
 John Bromwich / Adrian Quist | |
| Women's doubles | |
| Thelma Coyne / Nancye Wynne | |
| Mixed doubles | |
| Margaret Wilson / John Bromwich | |
| Boys' singles | |
| Max Newcombe | |
| Girls' singles | |
| Joyce Wood | |
| Boys' doubles | |
| Dinny Pails / Bill Sidwell | |
| Girls' doubles | |
| Alison Burton / Joyce Wood | |
Finals edit
Men's singles edit
Don Budge defeated John Bromwich 6–4, 6–2, 6–1
Women's singles edit
Dorothy Bundy defeated Dorothy Stevenson 6–3, 6–2
Men's doubles edit
John Bromwich / Adrian Quist defeated 
Gottfried von Cramm / Henner Henkel 7–5, 6–4, 6–0
Women's doubles edit
Thelma Coyne / Nancye Wynne defeated 
Dorothy Bundy / Dorothy Workman 9–7, 6–4
Mixed doubles edit
Margaret Wilson / John Bromwich defeated Nancye Wynne / Colin Long 6–3, 6–2