| D'Alton | Vernon | St.Draga, via Mt.Barker | DA8 | 1924 |
| D'Anrizio | G. | 4194, 4605, 4197, Albany | 4GD and 84B, 116E | 1962 |
| D'Arcy | Austin L. | Gunyidi | LD4 | 1924 |
| D'Arcy | P. C. | Erin Vale, Will. 13940, Wagin | P7D and 36D, 20E | 1962 |
| D'Arcy & Co. | W. L. | Wogoola Station, Onslow | D9Y and 59F, 84D | 1962 |
| D'Arcy-Evans | E. C. & R. | Yeedawinya, Katanning | 1AE and 102A, 19B | 1962 |
| D'Espeissis | J. L. | Glenone, Cape Naturaliste | K7O and 35B, 23A | 1962 |
| D'Orsogna Bros. | - | Midland Saleyards, Midland Junction | DB1 and 24A, 18B | 1962 |
| D'Raine | N. | Abattoirs, Midland Junction | 9VD | 1924 |
| D'Raine & Hunter | - | Plant. Locs. 8,9,75,77,216. Albany | 2DH and 38D, 111E | 1962 |
| D'Raine & Wheals | - | Collie | 9VD | 1924 |
| D. A. L. Pty. Ltd. | - | Ninghan 3279, 3460, 3330/2, 3304/5, Kalannie | D3L and 15D, 48E | 1962 |
| D. H. I. Pastoral Co. Pty. Ltd. | - | Dirk Hartog Station, Shark Bay | AP6 and 45A, 17B | 1962 |
| Da Ronch | G. V. | Nelson 2703, 2447, 11912, Greenbushes | 7RN and 36B, 17E | 1962 |
| Dacey | Michael | Paddy's Paddock, via Derby | Y7D | 1924 |
| Dacheff | A. D. | Golden Springs Farm, Chadoorah, via Pinjarra | Q2D and 119B, 36A | 1962 |
| Dacheff | Sam | Loc. 1273, Plavins Siding, via Pinjarra | Q2D | 1924 |
| Dadd | E. S. | Mokarni Farm, Erikin | 1UY and 17C, 24E | 1962 |
| Dadd | Edward S. | Mokarni Farm, Erikin | 1UY | 1927 |
| Daddow | F. | Riverview, Tambellup | 8FD | 1924 |
| Daddow | Fredk. Thos. | Waverley, Tambellup South | 5NV | 1924 |
| Daddow | J. E. A. | Loc. 357, Warralackin | 1MN and 44D, 53F | 1962 |
| Daddow | K. G. & E. M. | Sunny Hills, Tambellup | CP5 and 1C, 47A | 1962 |
| Daddow | Leo. Ernest | Last Chance Farm, North Burracoppin | 6DQ | 1925 |
| Daddow | R. C. | Wharoonga Farm, Warralackin | 6DQ and 53F, 6B | 1962 |
| Daddow | R. C. | Yilgarn Locs. 3245, 341, Warralackin | D9R and 102A, 32C | 1962 |
| Daff | A. | Blackrock Farm, Meckering | V0D | 1924 |
| Daff Bros. | W. & G. | Wandalea, Brunswick Junction | V0D and 41A, 113B | 1962 |
| Daffen | Arthur | Williams Loc. Kukerin | D9N | 1924 |
| Daft | Terence | Braidwood Minnivale | C9D | 1924 |
| Daglish | H. | Block 2130, Watheroo Area, Namban | DG6 | 1924 |
| Dagostino & Son | D. | 425, Harvey | DD3 and 67D, 21E | 1962 |
| Dahlberg | C. A. | Callalup A. A., Callaup | HD5 | 1912 |
| Dahlberg | C. A. | Callalup, | HD5 | 1924 |
| Dahlberg | William C. | Callalup, Augusta | VH5 | 1927 |
| Daintrey | R. | Vic. Locs. 6148-8112, Latham | 4YK and 102B, 52F | 1962 |
| Dairy Creek Pastoral Co. | - | Dairy Creek Station, Upper Gascoyne | 4FP | 1912 |
| Dairy Creek Pastoral Co. | - | Dairy Creek Station, Upper Gascoyne | 4FP | 1924 |
| Dairydale Past. Co. | - | Dairy Dale, Boyanup | 3RP and 19A, 119B | 1962 |
| Daisy Downs Past. Co. Pty. Ltd. | - | Daisy Downs, Mullewa | BO1 and 14C, 32A | 1962 |
| Dale | A. W. | Happy Valley, Kendenup | B9G and 40A, 29B | 1962 |
| Dale | Alfred J. | Blackboy Gully, Moodiarrup | AD3 | 1924 |
| Dale | Alfred J., jun | Blackboy Gully, Moodiarrup | AD3 | 1912 |
| Dale | Chas. Henry | Avon Loc. 15539, Nembudding | D4U | 1924 |
| Dale | Frank | Avon Loc. 23270, Yelbeni | QD5 | 1924 |
| Dale | J. A. | Daylesford, Katanning | ZD2 and 33D, 29E | 1962 |
| Dale | John | Fairfield Station, Derby | 6DE | 1924 |
| Dale | L. W. & J. A. V. | Runnymede, Yericoin | 8WS and 38D, 71E | 1962 |
| Dale | N. C. & G. M. | Carleton, Denmark | D7K and 48B, 25A | 1962 |
| Dale | Wm. T. | Dayleford, Kattaning | ZD2 | 1912 |
