| Thorpe | E. G. (Mrs) | Quinyambie, 13559, Pingaring | E7T and 116B, 4A | 1962 |
| Thorpe | Ebenezer | Industrious Farm, Loc. 359, Rockingham | ET7 | 1912 |
| Thorpe | Ebenezer | Industrious Farm, Loc. 359, Rockingham | ET7 | 1924 |
| Thorpe | Ed. | Fairview, Mundijong | ET9 | 1912 |
| Thorpe | Ed. | Fairview, Mundijong | ET9 | 1924 |
| Thorpe | F. A. | Silverton Farm, Northam | T9F | 1924 |
| Thorpe | H. A. | Loc. 7105, Gnowangerup | 5YT | 1924 |
| Thorpe | J. J. | Pozieres, East Rockingham | V3T | 1924 |
| Thorpe | J. J. | Deep Valley, Three Springs | V3T and 32C, 115E | 1962 |
| Thorpe | J. R. | Victoria Loc. 4589, 9675, 6662, 8240, 5176, Three Springs | 3VT and 30B, 4E | 1962 |
| Thorpe | James. B. | Industrious Farm, Loc. 353, Rockingham | JT5 | 1912 |
| Thorpe | Jas. B. | Industrious Farm Loc. 353, Rockingham | JT5 | 1924 |
| Thorpe | Thos. | Loc. 15644, Waddouring, via Kununoppin | 7PO | 1924 |
| Thorsager | F. | Lot 108 of Cockburn Sound, Lot 251, Spearwood | 9FT | 1912 |
| Thorsager | F. | Lot 108 of Cockburn Sound Lot 251, Spearwood | 9FT | 1924 |
| Thowless | Les M. | Lot 139, Group 55, Serpentine | QT6 | 1924 |
| Threadgold | E. H. | Commonage, Cue | E0T | 1912 |
| Threadgold | E. H. | Commonge, Cue | E0T | 1924 |
| Three River Station | - | Three Rivers Station, Meekatharra | 3RZ | 1924 |
| Three Rivers Station Pty. Ltd. | - | Three Rivers Station, Meekatharra | 3RZ and 1C, 21E | 1962 |
| Threlfall | G. | Springfield Farm, Korrelocking | 2GT | 1912 |
| Threlfall | G. | Springfield Farm, Korrelocking | 2GT | 1924 |
| Threlfall | G. & S. | Brighouse, Korrelocking | 2GT and 3D, 18E | 1962 |
| Throssell | E & H. V. | Fern Tree Gully, Cowcowing | AT9 | 1924 |
| Throssell | G. | Burlay Farm, Northam | GT9 | 1912 |
| Throssell | G. | Burlay Farm, Northam | GT9 | 1924 |
| Throssell | G. L. | Silverton, Goomalling | 4LT | 1912 |
| Throssell | G. L. | Silverton, Goomalling | 4LT | 1924 |
| Throssell | Hugo V. H. | Nembudding and Greenmount, Greenmount | H1T | 1926 |
| Thrum | E. H. | Mylnedale, Picton | ET2 | 1912 |
| Thrum | E. H. | Mylnedale, Picton Junction | ET2 | 1924 |
| Thrupp | Geo. | Boulder City Commonage, Boulder | T9U | 1924 |
| Thurkle | C. T. | Sunlea, Vasse, via Busselton | M6U and 4B, 104E | 1962 |
| Thurkle | Edw. G. | Pt. Torment Station, Derby | 1PT | 1912 |
| Thurkle | P. A. F. | Woodlands, Newton, via Busselton | 9PF | 1924 |
| Thurkle | P. A. F. | Woodlands, Vasse | 9PF | 1962 |
| Thurlow | J. C. | Kerry Hill, Boyup Brook | JT9 and 44B, 17A | 1962 |
| Thurman | Ernest G. | Sussex Locs. 1022, 1019, 1021, 862, 863, 840,, and 1177, Nuralingup | P5Q | 1925 |
| Thurston | Charlie Geo. | Waltun Park, Bencubbin | N3T | 1924 |
| Thurston | Morton F. | Riverside Farm, Dumbleyung | NT6 | 1924 |
| Thurston | R. R. | Nelson 8771, 11099, 5545, 11572, Northcliffe | CV2 and 104D, 10E | 1962 |
| Thurston | V. | The Plains, Cowcowing | OVT | 1924 |
| Thwaite & Fitton | J. H. & J. | Pastures, Springhurst Mail, Wagin East | N4F | 1924 |
| Thwaites | A. L. | Inglewood, Young's Siding | 8BA | 1962 |
| Thyne | J. & C. | Gumrew, Merredin | TB2 and 46C, 19E | 1962 |
| Thyne | T. K. | Chingah, Locs. 30015-6, Merredin | TY0 and 45D, 10E | 1962 |
| Tibbs | J. A. | Loc. 15906, Bruce Rock | R3U | 1924 |
| Tichbon | Hy. | Perth | 3HT | 1924 |
| Tichborne | F. J. | Dunrovin, Kudardup | FT0 and 118B, 42E | 1962 |
| Tickeroo Development Syndicate | - | Tickeroo Mel-2560, Morawa | 3TD and 35D, 33E | 1962 |
