| Tuthill | R. G. | Glenalwyn, Manjimup | JR8 and 37C, 21A | 1962 |
| Tutton | Frank | Brackendale, Kirup | F5T | 1924 |
| Twaddle | E. J. | Brookside 82-3-4, Hamel | 5JT and 37B, 107E | 1962 |
| Twaddle | William | The Pines, Hamel | W2T | 1928 |
| Tweddle | G. & J. | Coolamia, Mudijong | GT0 and 50D, 25E | 1962 |
| Tweddle | J. P. | Plantagenet Loc. 33, Robinson Estate, via Albany | 2PT and 10B, 104E | 1962 |
| Tweed | J. | Lamboo Station, Fitzroy Crossing | TX8 | 1924 |
| Tweedie | B. C. | Nelson Loc. 11516, 805, 1477, Bridgetown | B4T and 109D, 67E | 1962 |
| Tweedie | D. N. & V. A. | Tingle-mia, Boyup Brook | 2EE and 102B, 14E | 1962 |
| Tweedie | J. M. | Cliveden, Avon 16106, Kondinin | 7JT and 14D ,32E | 1962 |
| Tweedie | J. R. | Masonbrook, Cranbrook | 0TG and 52F, 114B | 1962 |
| Tweedie | T. Kay | Wellington A. A. Lot 184, Harvey | Y9X | 1924 |
| Tweedie & Co. | - | Milballilie, Cootabudda, Mt. Cleaver, Wiluna | 2TT | 1912 |
| Tweeney | J. | Erin-go-bragh, Nokanning | ND2 | 1924 |
| Twicham Farm Co. | - | Twicham, Mt. Barker | T7F and 3D, 46E | 1962 |
| Twigg | R. J. & H. D. | Torchwood, Narrikup No. 5932, Narrikup | 9RT and 118D, 26E | 1962 |
| Twin Peaks Pastoral Co. | - | Twin Peaks Station, Mullewa | 0PT and 1C, 45A | 1962 |
| Twin Rivers Grazing Co. | - | Twins Rivers, Konnongorring | TR8 and 21B, 118E | 1962 |
| Twine | A. G. | Marsemore, Toodyay | TJ6 | 1912 |
| Twine | A. G. | Marsemore, Toodyay | TJ6 | 1924 |
| Twine | E. E. | Moorambie and Duncuns Well, Toodyay | ET0 | 1912 |
| Twine | E. E. | Moorambie and Duncan's Well, Toodyay | ET0 | 1924 |
| Twine | E. L. & E. A. | Mourambie, Toodyay | ET0 and 21C, 3E | 1962 |
| Twine | F. S. | Newgain, Toodyay | 0FT and 16C, 16A | 1962 |
| Twine | Frank R. | Newgan, Toodyay | 0FT | 1924 |
| Twine | H. J. | Youndegin, Cunderdin | HT3 and 38B, 109A | 1962 |
| Twine | Jas. S. | Darbydale, Toodyay | J1T | 1912 |
| Twine | Jas. S. | Walgo, Toodyay | J1T | 1924 |
| Twine | John N. | Darbydale, Toodyay | JT7 | 1912 |
| Twine | John N. | Darbydale, Toodyay | JT7 | 1924 |
| Twine | N. O. | Puanding, Toodyay | N9T | 1924 |
| Twine | N. O. & D. A. | 1244-5, Narembeen | N9T and 36B, 21E | 1962 |
| Twine | W. G. | Bolgart, Newcastle | C9C | 1912 |
| Twine | W. G. | Bolgart | C9C | 1924 |
| Twine & Son | E. | Royd Nook, Tooday | 0AT and 21D, 46E | 1962 |
| Twitt | Wm. | Spring Vale, Narrogin | WZ7 | 1924 |
| Twomey | C. | Boyanup AA 19, 20-2, Dardanup | 6TY and 42C, 37E | 1962 |
| Twwedie & Co. | - | Milballilie, Cootabudda, Mt. Cleaver, Wiluna | 2TT | 1924 |
| Tyers | Minnie A. | Block 1791/74, West Collie | 2MP | 1912 |
| Tyers | Minnie A. | Block 1791/74, West Collie | 2MP | 1924 |
| Tyler | A. E. B. | Symonds Yat, Korrelocking | TY7 and 19B, 5E | 1962 |
| Tyler | C. J. & A. L. | Lot 9, Inglewood | L0J | 1962 |
| Tyler | E. P. | Upper Blackwood, Upper Blackwood | PT2 | 1912 |
| Tyler | E. P. & D. P. | Wellholme, Waroona | E0T and 28B, 24E | 1962 |
| Tyler | Enoch E. | Commonage, South Bunbury | 7ET | 1924 |
| Tyler | Enouch. E. | Commonage, South Bunbury | 7ET | 1912 |
| Tyler | G. | Hill Farm, Loc. 1, 3, 6, 7, Williams | VT9 and 102C, 4E | 1962 |
| Tyler | George | Hill Farm, Williams | VT9 | 1924 |
| Tyler | J. K. | Harvey A.A. 148, Wagerup | 6JD and 20B, 33E | 1962 |
| Tyler | K. W. | Moonlight Valley, Yarloop | KT4 and 12C, 14E | 1962 |
