| Dugdale | Mary Isabella | Toxteth Farm, Nungarin | OT3 | 1924 |
| Dugdale | Richard | kunckalgup, Yallingup | DX7 | 1924 |
| Dugdale | Richd. | Kunckalgup, Yallingup | DX7 | 1912 |
| Dugdale | W. E. & J. N. | Location 11144, Nungarin | DU2 | 1924 |
| Duggan | A. R. & A. I. | M 1171, M 1109 and 1272, Yericoin | 8AD and 15B, 119A | 1962 |
| Duggan | D. F. | M1169, Yericoin | F5D and 9B, 108E | 1962 |
| Duggan | J. J. | Wimmera, Yericoin | 2DJ and 5A, 49C | 1962 |
| Duggan | John | King Street, East Fremantle | 5KD | 1924 |
| Duggan | M. | Avalon and Bubbling Brook, Yericon | 7DN and 46D, 44E | 1962 |
| Duggan | N. M. | Nel. Loc, 12564, Rocky Gully, via Mt Barker | D4N and 84B, 27A | 1962 |
| Duggan | T. G. | 1724, Carramar, Cowaramup | TD3 and 21C, 45E | 1962 |
| Duggan | T. P. W. | M 1171, 1172, Yericoin | TD1 and 2C, 3E | 1962 |
| Duggan | Thos. | Northam, Northam | TD1 | 1912 |
| Duggan | Thos. | Northam | TD1 | 1924 |
| Duggan | W. | Locs. 3718, 1723, 1724, Cowaramup | 2YE | 1962 |
| Duggon | W. N. | Cheshire Downs, Dumbleyung P. O. | W3N | 1912 |
| Duggon | W. N. | Cheshire Downs, Dumbleyung | W3N | 1924 |
| Duke | A. S. | Common, Mt. Magnet | 8AD | 1912 |
| Duke | A. S. | Comon, Mt Magnet | 8AD | 1924 |
| Duke | C. D. | Lake View, Duketon via Laverton | CD0 | 1912 |
| Duke | C. D. | Lake View, Duketon, via Laverton | CD0 | 1924 |
| Duke | D. B. | Loc. 16, Kelmscott | 0DD | 1962 |
| Dullca | T. | Berrigrin Road, Lawlers | 4ZN | 1924 |
| Dulley | J. G. | Glenunga, Balingup | 1EZ | 1962 |
| Dumsday & Kell | - | Avon Locs. 14014 and 14015, Burracoppin | 3DK | 1912 |
| Dumsday & Kell | - | Avon Locs. 14014 & 14015, Burracoppin | 3DK | 1924 |
| Dun Corbett & Gee | - | Darda Station, Darlot | A5A | 1924 |
| Dunbar | D. P. | 408, 421, 422, Marvel Loch | D1D and 20A, 11B | 1962 |
| Dunbar | F. C. | 410, 446, 17, 20, Southern Cross | 7DW and 4B, 105E | 1962 |
| Dunbar | F. C. | White Wells, Southern Cross | XR0 and 56F, 84B | 1962 |
| Duncan | A.P. & D. J. | Springbrook, Moonyoonooka | AD2 and 17D, 108E | 1962 |
| Duncan | Alexander | Roe Locs. 744, 745, 755, Newdegate | AD1 | 1926 |
| Duncan | C. & R. | Stoneleigh, Greenough | 7LD and 39B, 7A | 1962 |
| Duncan | C. L. | Duncan's Farm, Greenough | 7LD | 1912 |
| Duncan | C. L. | Duncans Farm, Greenough | 7LD | 1924 |
| Duncan | Catherine | Farnham, Wagin | CD1 | 1924 |
| Duncan | Catherine E. | Farnham, Wagin | CD1 | 1912 |
| Duncan | D. | Mahonga, Orchard Valley, Kojanup | DD7 and 20D, 34E | 1962 |
| Duncan | D. F. | Kophor, Greenough | DD4 | 1912 |
| Duncan | D. F. | Kophor, Greenough | DD4 | 1924 |
| Duncan | F. E. H. | Elderslie, Rocky Gully | 6JD and 39C, 39A | 1962 |
| Duncan | Geo. O. | Booroondara, Koompup | 5DU | 1924 |
| Duncan | H.N. & E. C. | Hazeldeen, Doodlakine | 4DU and 22C, 106E | 1962 |
| Duncan | J. A. | Roe Locs. 745, 755, Newdegate | AD1 and 4B, 107A | 1962 |
| Duncan | J. G. | Hillside, Kellerberrin | DQ2 | 1924 |
| Duncan | J. H. & J. E. | Minjeburra, Bindi Bindi | 4JD and 18B, 107A | 1962 |
| Duncan | J. R. | Tynehill, Darkan | J9D and 32C, 112E | 1962 |
| Duncan | Jos. | Common, Greenbushes | 8JD | 1924 |
| Duncan | Jos. L. | Common, Greenbushes | 8JD | 1912 |
| Duncan | K. G. | Carawatha, Forest Grove | 8JD | 1962 |
