# 1931 Australian Championships – Mixed doubles

Nell Hall and Harry Hopman were the defending champions and the second seeds, but they lost in the semifinals.
The first-seeded Marjorie Crawford and Jack Crawford defeated unseeded Emily Hood Westacott and Aubrey Willard 7–5, 6–4 in the final, to win the mixed doubles tennis title at the 1931 Australian Championships.

## Seeds

* Marjorie Crawford / Jack Crawford (champions)
* Nell Hall / Harry Hopman (semifinals)
* Louie Bickerton / James Willard (quarterfinals)
* Sylvia Harper / Gar Moon (quarterfinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 2 | Nell Hall Harry Hopman | 7 | 4 | 6 | | | | | | | | | |
| | Mall Molesworth Jack Cummings | 5 | 6 | 4 | 2 | Nell Hall Harry Hopman | 10 | 2 | 5 | | | | |
| | Emily Hood Westacott Aubrey Willard | 6 | 7 | | | Emily Hood Westacott Aubrey Willard | 8 | 6 | 7 | | | | |
| 4 | Sylvia Harper Gar Moon | 4 | 9 | r | | | | | | | Emily Hood Westacott Aubrey Willard | 5 | 4 |
| 1 | Marjorie Crawford Jack Crawford | 1 | 6 | 6 | | | | | | 1 | Marjorie Crawford Jack Crawford | 7 | 6 |
| | Kathleen Le Messurier Don Turnbull | 6 | 3 | 1 | 1 | Marjorie Crawford Jack Crawford | 3 | 6 | 6 | | | | |
| | Ula Valkenburg Charles Donohoe | 3 | 6 | 8 | | Ula Valkenburg Charles Donohoe | 6 | 1 | 3 | | | | |
| 3 | Louie Bickerton James Willard | 6 | 1 | 6 | | | | | | | | | |

### Earlier rounds
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 2 | Nell Hall Harry Hopman | 5 | 10 | 6 | | | | | | | | | | |
| | | | | | | Joan Hartigan Clifford Sproule | 7 | 8 | 4 | | | | | | | | | | |
| | | | | | | | | | | 2 | Nell Hall Harry Hopman | 7 | 4 | 6 | | | | | |
| | | | | | | | | | | | Mall Molesworth Jack Cummings | 5 | 6 | 4 | | | | | |
| | | | | | | Mall Molesworth Jack Cummings | 6 | 7 | | | | | | | | | | | |
| | | | | | | Florence Francisco V. Edwards | 2 | 5 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 2 | Nell Hall Harry Hopman | 10 | 2 | 5 |
| | Emily Hood Westacott Aubrey Willard | 6 | 7 | | | | | | | | | | | | | Emily Hood Westacott Aubrey Willard | 8 | 6 | 7 |
| | Ruth Tann Harry Hassett | 3 | 5 | | | Emily Hood Westacott Aubrey Willard | 6 | 7 | | | | | | | | | | | |
| | Birdie Bond Allan Knight | 2 | 6 | 6 | | Birdie Bond Allan Knight | 1 | 5 | | | | | | | | | | | |
| | Youtha Anthony Willis Teague | 6 | 3 | 2 | | | | | | | Emily Hood Westacott Aubrey Willard | 6 | 7 | | | | | | |
| | Dorothy Weston Rupert Shepherd | 6 | 7 | | | | | | | 4 | Sylvia Harper Gar Moon | 4 | 9 | r | | | | | |
| | Mary Derham Reg Ewin | 3 | 5 | | | Dorothy Weston Rupert Shepherd | 4 | 2 | | | | | | | | | | | |
| 4 | Sylvia Harper Gar Moon | 6 | 6 | | 4 | Sylvia Harper Gar Moon | 6 | 6 | | | | | | | | | | | |
| | Gwen Utz Norman Peach | 1 | 4 | | | | | | | | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | Marjorie Crawford Jack Crawford | 6 | 6 | | | | | | | | | | | | | | | | |
| | Jean Wilson Thomas | 3 | 0 | | 1 | Marjorie Crawford Jack Crawford | w/o | | | | | | | | | | | | |
| | Barbara Bolger Jim Fitzgerald | w/o | | | | Barbara Bolger Jim Fitzgerald | | | | | | | | | | | | | |
| | partner Len Schwartz | | | | | | | | | 1 | Marjorie Crawford Jack Crawford | 1 | 6 | 6 | | | | | |
| | Pattie Meaney Paul Haege | 9 | 6 | | | | | | | | Kathleen Le Messurier Don Turnbull | 6 | 3 | 1 | | | | | |
| | Muff Wilson Jack McCausland | 7 | 0 | | | Pattie Meaney Paul Haege | 6 | 4 | 4 | | | | | | | | | | |
| | Kathleen Le Messurier Don Turnbull | 6 | 4 | 6 | | Kathleen Le Messurier Don Turnbull | 3 | 6 | 6 | | | | | | | | | | |
| | Frances Hoddle-Wrigley Walker | 2 | 6 | 4 | | | | | | | | | | | 1 | Marjorie Crawford Jack Crawford | 3 | 6 | 6 |
| | | | | | | | | | | | | | | | | Ula Valkenburg Charles Donohoe | 6 | 1 | 3 |
| | | | | | | Ula Valkenburg Charles Donohoe | w/o | | | | | | | | | | | | |
| | | | | | | Mrs. L. Baker Toss O'Connor | | | | | | | | | | | | | |
| | | | | | | | | | | | Ula Valkenburg Charles Donohoe | 3 | 6 | 8 | | | | | |
| | | | | | | | | | | 3 | Louie Bickerton James Willard | 6 | 1 | 6 | | | | | |
| | | | | | 3 | Louie Bickerton James Willard | 6 | 7 | | | | | | | | | | | |
| | | | | | | Betty Ward Ted Budrodeen | 2 | 5 | | | | | | | | | | | |