| 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 |
| Tyler | M. & J. | Falinge Park, Wagerup | 1RT and 14C, 102E | 1962 |
| Tyler | M. H. | Avon Loc. 9297, Ejanding | MT5 | 1912 |
| Tyler | M. H. | Avon Loc. 9297, Ejanding | MT5 | 1924 |
| Tyler | Robert G. M. | Bentley Hall, Northam | 1RT | 1928 |
| Tyler Bros. | - | Commonage, Fremantle | TH0 | 1912 |
| Tyler Bros. | - | Symondysat, Korrelocking | TY7 | 1912 |
| Tyler Bros. | - | Commonage, Fremantle | TH0 | 1924 |
| Tyler Bros. | - | Symondsyat, Korrelocking | TY7 | 1924 |
| Tylor | Albert Geo. | Wilga Run, Wilga | 8TG | 1924 |
| Tyndale | M. | Bilgiden, Yarramony | 2MT | 1912 |
| Tyndale | M. | Bilgiden, Yarramony | 2MT | 1924 |
| Tyndall | R. W. & A. M. | 1954, Northam | RT3 and 15B, 115E | 1962 |
| Tynedale Pty. Ltd. | - | Tynedale, via Burekup | TD5 | 1962 |
| Tyrer | G. B. | Homeland Dale, Bencubbin | T9V | 1924 |
| Tyrer | M. T. | Northamton A. 774, Rocky Gully via Mt Barker | 0MT and 28B, 10A | 1962 |
| Tyrrell | F. C. F. | Lots 14-5 CAA, Waterloo | 0HZ and 109D, 44E | 1962 |
| Tyrrell | Geo. Thos. A. | Kimberley, Waterloo, S. W. R. | GF1 | 1924 |
| Tyrrell | J. J. | Coolinup Loc. 657, Esperance | 2XT and 10C, 110A | 1962 |
| Tyrrell | J. W. H. | 3557-8, Waterloo | 9JT and 31D, 107E | 1962 |
| Tyrrell | K. G. | 13, 3553-4, Waterloo | TT6 | 1962 |
| Tyrrell | K. W. & T. D. | Tarrangower Lots 28, 29 and 3, Waterloo | KT3 and 21B, 22E | 1962 |
| Tyrrell | Mariau | Boyatiup, via Esperance | MT1 | 1926 |
| Tyrrell | Thos. | Kimberley Farm, Waterloo | TT6 | 1912 |
| Tyrrell | Thos. | Kimberley, Waterloo | TT6 | 1924 |
| Tyrrell | W. | Prinsep Park, Dardanup | W8T | 1912 |
| Tyrrell | W. | Prinsep Park, Dardanup | W8T | 1924 |
| Tyrrell & Co. | G. | 3553-4 Lot 13, Waterloo | GF1 and 18D, 24E | 1962 |
| Tyson | C. H. | Lone Pine, Kulin | 0TY and 29B, 48E | 1962 |
| Tyson | E. | Glen Ohrma, Jitarning | F7S and 27D, 34E | 1962 |
| Tyson | F. C. & V. H. | Carinya, Kondinin | LK9 and 16B, 103A | 1962 |
| Tyson | J. T. | S. E. Kulin | 0TY | 1924 |
| Tyson & Sons | M. | Sunrise and Holmhurst, Kulin | T1S and 15B, 33A | 1962 |
| Tyson Bros. | - | Mt. Narrayer and Woogorong, Yalgoo | 1TY | 1912 |
| Tyson Bros. | - | Mt. Narryer and Woogorong, Yalgoo | 1TY | 1924 |
| Udell | W. J. | Nelson Loc. 5486, and 467 and 5487, Manjimup | W2U | 1962 |
| Udgy | Henry | Block 370, Argyle | H1U | 1912 |
| Udy--- | Henry | Block 370, Argyle | H1U | 1924 |
| Ueieh | C. | 11092 Nelson Loc, Nannup | 5CU | 1962 |
| Uffindell & Morrish | - | Locs. 3478-83, Woolundra | 7VA | 1924 |
| Uglow | A. R. & G. | 3879, 3935, 8763, Morawa | A2U and 52F, 104B | 1962 |
| Uhe | F. L. | Glenera, Goomalling | FU3 | 1912 |
| Uhe | F. L. | Glenera, Goomalling | FU3 | 1924 |
| Uhr | L. K. sen. | Wombiana, Kojonup | LU4 | 1924 |
| Ulbrich | C. F. & M. | Kiearra, West Pingelly | C1U and 2C, 116E | 1962 |
| Ulbrich | L. D. | Carramar, Kelmscott | L1U and 84D, 108E | 1962 |
| Ulbrich | R. D. | Long Acers, Brookton | R1U and 32B, 4A | 1962 |
| Ullinger & Sons | - | Rossmore, Goomalling | CY6 and 27B, 19A | 1962 |
