| Dunnet | Jas. | Flybrook, Pemberton | DZ8 | 1924 |
| Dunnet | L. A. | Quongup, Nannup | S3U and 102D, 22E | 1962 |
| Dunnet | M.and L. | Flybrook, Pemberton | DZ8 | 1926 |
| Dunnet | O. M. | Christmas Creek, Nannup | IH7 and 4D, 39E | 1962 |
| Dunnet | O. M. J. V. & L. A. | Tanjanerup Brook, Nannup | D7O and 22D, 112E | 1962 |
| Dunnicliffe | N. C. | Murray 1444, Waroona | 9ND and 21A, 40B | 1962 |
| Dunning | H.F. | Lots 956, 63, Hamel | D7F | 1924 |
| Dunning | M. & R. M. | KIlman, Gabbin | M1D and 67A, 22B | 1962 |
| Dunning | M. P. | Loc. 12757, Dowerin | U2D and 10B, 113E | 1962 |
| Dunning | P. | 1199 & 138, Kelmscott | D6F and 13C, 16E | 1962 |
| Dunning | W.R. & M. | Mayfield, East Wickerpin | U2D | 1924 |
| Duns & Son | F. & D. | Lomo-Lomo Roe 1035, Hyden | MD4 and 38B, 22B | 1962 |
| Dunstan | C. | Leura Dairy, Claremont | CD5 | 1912 |
| Dunstan | C. | Leura Dairy, Claremont | CD5 | 1924 |
| Dunstan | J. J. | Oakleigh, Wagin | D7J | 1912 |
| Dunstan | J. J. | Oakleigh, Wagin | D7J | 1924 |
| Dunterry Grazing Co. Pty. Ltd. | - | Dunterry, E. Bullsbrook | D2G and 14B, 20A | 1962 |
| Dunty | D. | Blocks 23 and 83, Tammin | 0DD | 1912 |
| Dunty | D. | Blocks 23 & 83, Tammiu | 0DD | 1924 |
| Dunwell | R. | Home Farm, Yealering | 1UD and 118A, 53F | 1962 |
| Dunwell & Sons | D. | Avon Loc. 16231- 6, 21227, Narembeen | 2DD and 43D, 6E | 1962 |
| Dupe & McLeary | - | Plant. Loc. 5714, Narrikup | 2DM and 103B, 36A | 1962 |
| Duperonzel | G. C. (jnr) | Talbot, Southern Cross | K0D | 1962 |
| Duperouzel | G. C. (Jnr) | Talbot, York | K0D | 1927 |
| Duperouzel | Geo. | Qualin, York | 6DU | 1924 |
| Duperouzel | L. C. & M. H. | Qualan, York | 6DU and 107B, 17E | 1962 |
| Duplex | B. M. | 8072 & Railside, Geraldton | 7YD and 4D, 17E | 1962 |
| Duplex | John Bernard | Erada, via Geraldton | 7YD | 1924 |
| Duplex | Wm. | Carneys Hill via Geraldton | D1X | 1924 |
| Duplex | Wm. B. | Carney's Hill, via Geraldton | D1X | 1912 |
| Durack | - | Junction Station, Wyndham | U4Z | 1924 |
| Durack | Ambrose | Argyle Station, Wyndham | 7AN | 1912 |
| Durack | Ambrose | Argyle Station, Wyndham | 7AN | 1924 |
| Durack | Frank J. | Ethel Creek Station, via Meekatharra | YZ0 | 1924 |
| Durack | J. B. | Springfield, Wickerpin | D7U | 1924 |
| Durack | M. J. | Arrino Station, Arrino | DU1 | 1924 |
| Durack | P. & B., Sons | Eulinna Station, Kurnalpi | TH1 | 1926 |
| Durack | P. M. | Arrino Estate, Arrino | DU1 | 1912 |
| Durack | P. M. | Liahwan Station., Wyndham | M1Y | 1912 |
| Durack | W. E. | Mantinea, Yandanooka | 2WD and 104A, 42B | 1962 |
| Durack & Co. | W. F. | Thylungra, Nungarin | 0YZ and 33C, 3A | 1962 |
| Durack & Gregor | A. | Adavale Station, Wyndham | U1D | 1912 |
| Durack Bros. | - | Arrino Station, Arrino | DU1 and 32B, 32E | 1962 |
| Durant | E. W. | Swan 1091, Herne Hill | EW1 and 37A, 33C | 1962 |
| Durbridge | C. | Mt. Magnet | C1D | 1912 |
| Durbridge | C. | Mt. Magnet | C1D | 1924 |
| Durbridge | Charles G. | Golden Valley via Bullfinch | 3OU | 1912 |
| Durbridge | Francis D. | Lease 1485, Leonora | DU8 | 1924 |
| Durham | G. H. & J. C. | Fairholme, Dangin | G3D and 60F, 14D | 1962 |
| Durham | Geo. | Fairholme, Dangin | G3D | 1924 |
