| Thomas | Wm. | Thomas Farm, Katanning | UT9 | 1924 |
| Thomas | Wm. | Ethelvale, Kulyoling | W6T | 1924 |
| Thomas | Wm. Jas. | Commonage, Carnarvon | 6UT | 1924 |
| Thomas | Wm. M | Harvey Downs, Harvey | WT8 | 1912 |
| Thomas | Wm. M. | Wellard Estate, Benger | O7T | 1924 |
| Thomas | Wm. M. | Harvey Downs, Harvey | WT8 | 1924 |
| Thomas & Co. | J. F. | Locs. 8767, 7880, Marchagee | 8TT and 108B, 15E | 1962 |
| Thomas & Co. | W. J. | Gum Creek, Mullewa | U7T and 14C, 12A | 1962 |
| Thomas & Pratt | - | Lot 367, Herdsman Lake | 7XT and 38D, 109E | 1962 |
| Thomas & Roberts | - | Karrakin, East York | CE3 | 1924 |
| Thomas & Son | J. L. | Spring Dell, Beverley | J6L and 10C, 6A | 1962 |
| Thomas & Sons | E. B. | Lots 24, 34-5, Yandanooka | K8H and 114D, 114E | 1962 |
| Thomas & Sons | E. R. | Ravenswood, Pinjarra | T0S | 1924 |
| Thomas & Sons | E.R. | Ravenswood, Pinjarra | T0S | 1912 |
| Thomas Bros. | - | 588, 864, 454, 874 and 1491, Seadden and Esperance | O0T and 21D, 103E | 1962 |
| Thomas Bros. | - | 403, Sandycreek | T1P and 103D, 38E | 1962 |
| Thomas Ltd. | W. & Coy | Jibberding, Wubin | J0X | 1924 |
| Thomas, Hortin & Co. | - | Melrose, Lower Chittering | HT5 and 36E, 117D | 1962 |
| Thompson | A. | P. and 13, 196-7, 212-3, Byford and Jarrahdale | 9AT and 105D, 10E | 1962 |
| Thompson | A. | Cestreleigh, Grass Patch | AT3 and 48B, 29E | 1962 |
| Thompson | A. & J. N. | Plantagenet 4870, Albany | 6AJ and 38C, 112A | 1962 |
| Thompson | A. B. W. | Roebourne | T1L | 1912 |
| Thompson | A. C. | Mindarra, Mogumber | A3T | 1924 |
| Thompson | A. C. | St. Elmo, Beverley | AT6 | 1924 |
| Thompson | A. F. | Commonage, Laverton | 1AT | 1912 |
| Thompson | A. P. | Rock Brook, near Brookton | A4T | 1924 |
| Thompson | A. W. M. | Nairibin Farm, Dumbleyung | T6Z | 1924 |
| Thompson | A.C | Mindarra, Mogumber | A3T | 1912 |
| Thompson | A.C. | St. Elmo, Beverley | AT6 | 1912 |
| Thompson | A.M.S. | The Fosse, 141- Mile Gate, R. P. Fence; Warren Road, East Katanning | A5T | 1912 |
| Thompson | Alex. | Lease Mida, Derby | Q0T | 1924 |
| Thompson | Alfred | Kiora, Laverton | V1C | 1912 |
| Thompson | Arnold W. | Wangelling Pool, West Wagin | 8TZ | 1924 |
| Thompson | Arthur C. | Wangelling Farm, West Wagin | T3Z | 1924 |
| Thompson | B. | Glen Erin, Bruce Rock | KT5 | 1924 |
| Thompson | B. | Eureka, Mooliabeenee | 6BT and 49D, 104E | 1962 |
| Thompson | C. | Robinvale, Donnybrook | 9CT and 71C, 111A | 1962 |
| Thompson | C. J. | Kojonup Loc. 8785, Kojonup | T8J and 34B, 102A | 1962 |
| Thompson | C. L. | Brickhouse, West Pingelly | C9B and 7D, 109E | 1962 |
| Thompson | C. S. | Jurral, Gillingarra | OT3 | 1924 |
| Thompson | C. S. & R. | Waranga, East Pingelly | XM2 and 10B, 21E | 1962 |
| Thompson | C.S. | Jurral, Gillingarra | CT3 | 1912 |
| Thompson | Chas | Maynup, Scott's Brook | C2T | 1912 |
| Thompson | Cyril J. | Avon Loc. 21788, Narembeen | 5EQ | 1925 |
| Thompson | D. J. | Block Nos. 12827, 5502, 7821, 4832-3, 4532, 12821, West Wagin | DT8 and 24B, 111E | 1962 |
| Thompson | E. | Moyston Farm, Dowerin | Q9T | 1924 |
| Thompson | E. G. | Woodlands, Hyden | ET2 and 37C, 45E | 1962 |
| Thompson | E. M. | Oakabella, Beverley | X8X | 1924 |
| Thompson | E. V. | Wet Kop, Bridgetown | LT3 | 1912 |
| Thompson | E.M | Oakabella, Beverley | X8X | 1912 |
