| Thornbury | W. J. | Kojonup | Maxwell | KO ● 33 | Kojonup Road Board | 1926-27 |
| Thornbury | W. J. | Kojonup | Ford | KO ● 109 | Kojonup Road Board | 1926-27 |
| Thornbury | W. J. | Kojonup | Ford | KO ● 109 | Kojonup Road Board | 1927-28 |
| Thorne | A. G. | Dowerin | Morris-Cowley | D ● 200 | Dowerin Road Board | 1927-28 |
| Thorne | D. E. | Milledon | Dodge | SW ● 58 | Swan Road Board | 1926-27 |
| Thorne | D. E. | Millendon | Dodge | SW ● 58 | Swan Road Board | 1927-28 |
| Thorne | Dr R. J. H. | - | Chevrolet | NGN 128 | Narrogin Municipality | 1926-27 |
| Thorne | H. J R. | Kellerberrin | Chevrolet | KE ● 30 | Kellerberrin Road Board | 1927-28 |
| Thorne | L. W. | 30 Henderson Street, Fremantle | Chevrolet | 12524 | Metro Private Car | 1927-28 |
| Thorne | Lindsay | Milledon | Chevrolet | SW ● 27 | Swan Road Board | 1926-27 |
| Thorne | Lindsay | Millendon | Chevrolet | SW ● 27 | Swan Road Board | 1927-28 |
| Thorne | O. C. | Cunderdin | International Truck | ME ● 307 | Meckering Road Board | 1927-28 |
| Thorne | W. J. | Bruce Rock | Ford | BK 21 | Bruce Rock Road Board | 1923 - 1924 |
| Thornett | E. E. | Dowerin | Ford | D ● 90 | Dowerin Road Board | 1924-25 |
| Thornett | E. E. | Dowerin | Ford | D ● 90 | Dowerin Road Board | 1925-26 |
| Thornett | E. E. | Dowerin | Ford | D ● 90 | Dowerin Road Board | 1926-27 |
| Thornett | E. E. | Dowerin | Republic Truck | D ● 147 | Dowerin Road Board | 1926-27 |
| Thornett | E. E. | Dowerin | Ford | D ● 90 | Dowerin Road Board | 1927-28 |
| Thornett | E. E. | Dowerin | Republic Truck | D ● 147 | Dowerin Road Board | 1927-28 |
| Thornett | Frank | Wilson Street | Ford 16 H.P. | KMC 53 | Kalgoorlie Municipality | 1919 |
| Thornett & Bignell | - | Moodiarrup | Chevrolet | AW ● 47 | West Arthur Road Board | 1926-27 |
| Thornetts Transport | - | Carnarvon | G.M.C. Truck | CN 54 | Carnarvon Municipal Council | 1927-28 |
| Thornetts Transport | - | Carnarvon | Graham Truck | CN 94 | Carnarvon Municipal Council | 1927-28 |
| Thornley | H. S. | Narrogin | Ford | NO ● 83 | Narrogin Road Board | 1926-27 |
| Thornley | H. S. | Narrogin | Ford | NO ● 83 | Narrogin Road Board | 1927-28 |
| Thornton | C. | 7 First Avenue, South Perth | Ford | 1027 | Metro Private Car | 1924-25 |
| Thornton | C. | 7 First Avenue, East Perth | Ford | 1027 | Metro Private Car | 1925-26 |
| Thornton | Clifford | 7 First Avenue, East perth | Ford | 1027 | Metro Private Car | 1923-24 |
| Thornton | H. L. | Norwood Road, Belmont | Douglas | 869 | Metro Motorcycle | 1922-23 |
| Thornton | J. | Bullaring | Ford | CR ● 45 | Corrigin Road Board | 1924-25 |
| Thornton | J. | Bullaring | Studebaker | CR ● 45 | Corrigin Road Board | 1925-26 |
| Thornton | J. | Bullaring | Studebaker | CR ● 45 | Corrigin Road Board | 1926-27 |
| Thornton | J. | Bullaring | Studebaker | CR ● 45 | Corrigin Road Board | 1927-28 |
| Thornton | J. B. | Denmark | Ford Truck | DE ● 44 | Denmak Road Board | 1926-27 |
| Thornton | J. B. | Denmark | Ford Truck | DE ● 44 | Denmark Road Board | 1927-28 |
| Thornton | J. G. | 809 Hay Street, Perth | Hupmobile | 2532 | Metro Private Car | 1924-25 |
| Thornton | J. G. | 809 Hay Street, Perth | Hupmobile | 2532 | Metro Private Car | 1925-26 |
| Thornton | J. G. | Perth | Hupmobile | 2532 | Metro Private Car | 1926-27 |
| Thornton | J. G. | 13 Viewway Nedlands | Chrysler | 14913 | Metro Private Car | 1927-28 |
| Thornton | James | Bullaring | Ford | CR ● 45 | Corrigin Road Board | 1923-24 |
| Thornton | James | Bullaring | Chevrolet Truck | CR ● 231 | Corrigin Road Board | 1927-28 |
| Thornton | P. C. | 123 Brisbane Street | Triumph 3½ H.P. Motorcycle | P 264 | Perth Municipality | 1915 |
| Thornton | P. C. | C/o. Dr. Seed, Saint George's Terrace | Pope 7 H.P. | P 49 | Perth Municipality | 1916 |
| Thornton | P. C. | 7 First Avenue, East Perth | Chevrolet | 1027 | Metro Private Car | 1927-28 |
| Thornton | R. W. | 42 Kingston Avenue, West Perth | Studebaker | 2482 | Metro Private Car | 1925-26 |
| Thornton | S. | Wagin | Chevolet | WN 43 | Wagin Municipality | 1926-27 |
| Thornton | S. | Wagin | Chevrolet | WN 43 | Wagin Municipality | 1927-28 |
| Thornton | Smith W. | Cunderdin | Chevrolet Truck | ME ● 184 | Meckering Road Board | 1927-28 |
| Thornton | W. J. | Wagin | Ford | W ● 93 | Wagin Road Board | 1924-25 |
| Thornton Bros | - | 487 Beaufort Street | Triumph 3½ H.P. Motorcycle | P 531 | Perth Municipality | 1917-18 |
