| Thornton Bros. | - | 487 Beaufort Street | Rudge 3½ H.P. Motorcycle | P 531 | Perth Municipality | 1919 |
| Thorogood | A. | Albany Road, Victoria Park | Hupmobile | 9064 | Metro Private Car | 1925-26 |
| Thorogood | A. R. | 76 Leonard's Street, Victoria Park | Triumph 2¼ H.P. Motorcycle | P 1094 | Perth Municipality | 1919 |
| Thorogood | A. R. | 76 Leonard Street, Victoria Park | Ford | 2611 | Metro Private Car | 1923-24 |
| Thorogood | A. R. | 76 Leonard Street, Victoria Park | Ford | 2611 | Metro Private Car | 1924-25 |
| Thorogood | A. R. | 256 Albany Road, Victoria Park | Ford | 2611 | Metro Private Car | 1925-26 |
| Thorogood | A. R. | Victoria Park | Overland | 2611 | Metro Private Car | 1926-27 |
| Thorogood | A. R. | 256 Albany Highway Victoria Park | Overland | 2611 | Metro Private Car | 1927-28 |
| Thorogood | A. R. | Kalamunda | Hupmobile | DR ● 119 | Darling Range Road Board | 1927-28 |
| Thorogood | Arthur | Leonard Street | Triumph 2¼ H.P. Motorcycle | VP 27 | Victoria Park Municipality | 1916 |
| Thorp | H. A. | Gnowangerup | Rugby | GN ● 141 | Gnowangerup Road Board | 1927-28 |
| Thorp | H. A. | Gnowangerup | Ford Truck | GN ● 162 | Gnowangerup Road Board | 1927-28 |
| Thorpe | A. | C/o Davies Franklin | B.S.A. 3½ H.P. Motorcycle | P 508 | Perth Municipality | 1915 |
| Thorpe | C. L. | Albany Road, Cannington | Chevrolet | 5376 | Metro Private Car | 1926-27 |
| Thorpe | C. L. | Albany Road, Cannington | Chevrolet | 5376 | Metro Private Car | 1924-25 |
| Thorpe | C. L. | Albany Road, Cannington | Chevrolet | 5376 | Metro Private Car | 1925-26 |
| Thorpe | C. L. | Albany Road, Cannington | Chevrolet | 5376 | Metro Private Car | 1927-28 |
| Thorpe | E. | Plavins Siding | Chevrolet | MY ● 133 | Murray Road Board | 1925-26 |
| Thorpe | E. | Plavins Siding | Chevrolet | MY ● 133 | Murray Road Board | 1926-27 |
| Thorpe | Ellen | 123 Duke Street, East Fremantle | Chevrolet | 5339 | Metro Private Car | 1927-28 |
| Thorpe | H. A. | Gnowangerup | Rugby | GN ● 141 | Gnowangerup Road Board | 1926-27 |
| Thorpe | Harold | 48 Northwood Street, West Leederville | Hudson | 10528 | Metro Hire or Trade | 1927-28 |
| Thorpe | J. | Hope Valley | Ford Truck | RO ● 14 | Rockingham Road Board | 1923-24 |
| Thorpe | J. | Jarrahdale | Federal-Knight 'Bus | SJ ● 19 | Serpentine-Jarrahdale Road Board | 1925-26 |
| Thorpe | J. | Jarrahdale | Chevrolet 'Bus | SJ ● 48 | Serpentine-Jarrahdale Road Board | 1925-26 |
| Thorpe | J. | Jarrahdale | Fedral night bus | SJ ● 19 | Serpentine-Jarrahdale Road Board | 1926-27 |
| Thorpe | J. | Jarrahdale | Studebaker | SJ ● 23 | Serpentine-Jarrahdale Road Board | 1926-27 |
| Thorpe | J. | Jarrahdale | Reo Bus | SJ ● 48 | Serpentine-Jarrahdale Road Board | 1926-27 |
| Thorpe | J. | Jarrahdale | Federal Knight Bus | SJ ● 19 | Serpentine-Jarrahdale Road Board | 1927-28 |
| Thorpe | J. | Jarrahdale | Studebaker | SJ ● 23 | Serpentine-Jarrahdale Road Board | 1927-28 |
| Thorpe | J. | Jarrahdale | Reo Bus | SJ ● 48 | Serpentine-Jarrahdale Road Board | 1927-28 |
| Thorpe | Mrs E. | Rockingham | Chevrolet | RO ● 62 | Rockingham Road Board | 1927-28 |
| Thorpe | O. M. | Quairading | Ford | Q ● 273 | Quairading Road Board | 1927-28 |
| Thosford | A. | 76 Street, Leonard's Avenue, West Leederville | Triumph 2½ H.P. Motorcycle | P 1094 | Perth Municipality | 1917-18 |
| Three River Station, Ltd | | Three River Station | Dodge | MK ● 41 | Meekatharra Road Board | 1924-25 |
| Three Springs Church Committee | - | - | Dodge | CA ● 175 | Carnamah Road Board | 1927-28 |
| Threkield | H. G. | 53 The Avenue, Nedlands | Buick | 4088 | Metro Private Car | 1926-27 |
| Threkleid | H. G. | 53 The Avenue, Nedlands | Buick | 4088 | Metro Private Car | 1925-26 |
| Threlfall | G. | Korrelocking | Overland | WM ● 12 | Wyalkatchem Road Board | 1924-25 |
| Threlfall | G. | Korrelocking | Overland | WM ● 12 | Wyalkatchem Road Board | 1925-26 |
| Threlfall | G. | Korrelocking | Chevrolet Truck | WM ● 209 | Wyalkatchem Road Board | 1926-27 |
| Threlfall | G. | Korrelocking | Buick | WM ● 212 | Wyalkatchem Road Board | 1926-27 |
| Threlfall | G. | Korrelocking | Chevrolet Truck | WM ● 209 | Wyalkatchem Road Board | 1927-28 |
| Threlfall | G. | Korrelocking | Buick | WM ● 212 | Wyalkatchem Road Board | 1927-28 |
| Threlfall | G. T. | Korrelocking | Overland | WM ● 12 | Wyalkatchem Road Board | 1923-24 |
| Threlkeld | H. G. | 53 The Avenue, Nedlands | Buick | 4088 | Metro Private Car | 1924-25 |
| Threlkeld | H. G. | 31 The Avenue, Nedlands | Buick | 14954 | Metro Private Car | 1927-28 |
| Thring | J. E. | Ajana | Grey | NR ● 32 | Northampton Road Board | 1925-26 |
| Thring | J. E. | Ajana | Grey | NR ● 32 | Northampton Road Board | 1926-27 |
| Thring | J. E. | - | Buick | NR ● 150 | Northampton Road Board | 1926-27 |