| Duncan | L. N. | W.S.L.S. Farm A 1216, Gairdner River | L0D and 40B, 31E | 1962 |
| Duncan | L. R. & L. J. | Raphoe Bridge Farm, Greenough | L1D and 14B, 12E | 1962 |
| Duncan | N. D. | Gidgegannup, Gidgegannup | DN2 | 1962 |
| Duncan | Roy W. | Kockatea, via Mullewa | D5R | 1924 |
| Duncan | S. | Calilah, Moonyoonooka | DS8 and 113E, 16D | 1962 |
| Duncan | T. D. | Tirkalocker, Mt. Magnet | TE5 | 1912 |
| Duncan | T. D. | Tirkalocker, Mt. Magnet | TE5 | 1924 |
| Duncan | T. P. | Tirkalocker, Mt. Magnet, Greenough | TD5 | 1912 |
| Duncan | T. P. | Tirka Locka, Mt. Magnet | TD5 | 1924 |
| Duncan | Wm. C. N. | Wilroy, Kockatea, via Mullewa | 7ZD | 1924 |
| Duncan & Gordon | - | Hillside, Marble Bar | DJ0 | 1912 |
| Duncan & Gordon | - | Hillside, Marble Bar | DJ0 | 1924 |
| Duncan & Son | G. O. | Boroondara, Toompup | 5DU and 19C, 15E | 1962 |
| Duncanson | G. J. & H. R, | 17374-67, 8606, 12453, 12454, 12592, 21905, 21883, Corrigin | G6D and 8B, 31E | 1962 |
| Duncanson | Robt. | Blocks 12453, 41852, Dangin | R6D | 1924 |
| Dunckley | Chas. G. | Loc. 3040, Kojonup | 3GD | 1924 |
| Dundas & Son | - | Lot 21 & 22, Midland Junction | F7D and 42B, 34E | 1962 |
| Dundon | T. J. | Willowdale, Yarloop | 5TD | 1962 |
| Dundoona Grazing Co. | - | Dundoona, Wooroloo | DG7 and 35B, 45A | 1962 |
| Dunearn Pastoral Co. | - | Dunearn, Mel. 3804, 2349-50, 3531,1780, Dandaragan | DP0 and 26B, 45E | 1962 |
| Dungey | C. | Rosedale, Burekup | C5D and 21C, 15E | 1962 |
| Dungey | D. A. | 186, 104, 105, Narrogin | A3D and 119B, 48E | 1962 |
| Dungey | F. B. | Waterdale, Widgemooltha | 9DT | 1924 |
| Dungey Bros. | - | Geelaring Springs, Jitarning | DU0 and 30D, 7E | 1962 |
| Dunham | A. E. | Sunnyhill, Wagin | A6D | 1912 |
| Dunham | A. E. | Sunnyhill, Wagin | A6D | 1924 |
| Dunham | A. E. | Will Loc. 10989, 11940, 9504, Lake Grace | A6D and 13C, 37E | 1962 |
| Dunham | E. | Brockelohy, Kukerin | O5D | 1924 |
| Dunham | G. E. | Williams Locs. 9272, 8007, 13368, Jitarning | 4ZO | 1924 |
| Dunham | G. W. | Locs. 8007, 9273-4-2, Kulin | 4Z0 and 22B, 7E | 1962 |
| Dunham | L. J. | Brocklesby, York | D4W | 1912 |
| Dunham | L. J. | Brockelsby, York | D4W | 1924 |
| Dunham | N. E. & O. P. | Emu Plains, Lake Grace | N2D and 38C, 48E | 1962 |
| Dunham & Sons | A. G. | Graigstone, Kukerin | 2DN and 44D, 84E | 1962 |
| Dunhill | Chas. | Nether Edg, Kondut | 6TQ | 1924 |
| Dunjey | Donald B. B. | Locs. 8680, 8681, & 9257, Jitarning, via Wickepin | DU0 | 1924 |
| Dunkeld | G. A. | Roe Loc. 690, Lake Biddy | QD6 and 6B, 35E | 1962 |
| Dunkeld | Gordon Alan | Roe Loc. 690, Newdegate | QD6 | 1924 |
| Dunkin | Richard | Block 4721/68, Tenindewa | RD3 | 1912 |
| Dunkin | Richard | Block 4721/68, Tenindewa | RD3 | 1924 |
| Dunkin & Son | - | Bundoon, Tenindewa | RD3 and 67B, 21E | 1962 |
| Dunkley | F. S. | 811 Williams, Arthur River | D8V and 32B, 50E | 1962 |
| Dunkley | G. B. & J. H. | Cricklewood and the Junction, Moore River & Yelbini | 7BD and 7C, 15A | 1962 |
| Dunkley | Geo. | Stirling Estate, Capel | GD0 | 1912 |
| Dunkley | Geo. | Stirling Estate, Capel | GD0 | 1924 |
| Dunkley | Geo. | Cricklewood, Yelbeni | VD3 | 1924 |
| Dunleath Pastoral Co. | - | Dunleath, Darkan | DP6 and 16E, 67B | 1962 |
| Dunlop | David | Wokenana, Northampton | D8D | 1924 |
| Dunlop | David & Marion S. | Pinmore, Williams | D2D | 1927 |
| Dunlop | W. C. & M. A. | Block No. 6493, Green Range area, Green Range | 2UP and 14C, 107A | 1962 |
