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
editMen'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