| Stewart & Wehl | - | Bonney Downs | Ford | NU ● 4 | Nullagine Road Board | 1925-26 |
| Stewart & Abbott | - | Fitzgerald Street | Rugby | N 123 | Northam Municipality | 1924-25 |
| Stewart & Abbott | C.K.& A. | Fitzgerald Street | Rugby | N 123 | Northam Municipality | 1925-26 |
| Stewart & Co | - | Bazaar Terrace, Perth | Maxwell | 69 | Metro Private Car | 1925-26 |
| Stewart & Co | Wm. | 37 George Street, West Perth | Ford | 11939 | Metro Private Car | 1927-28 |
| Stewart & Lloyd | - | 886 Hay Street, Perth | Dodge | 6260 | Metro Private Car | 1924-25 |
| Stewart & Lloyd | - | Hay Street, Perth | Dodge | 2345 | Metro Private Car | 1924-25 |
| Stewart & Lloyd | - | 886 Hay Street, Perth | Dodge | 6260 | Metro Private Car | 1925-26 |
| Stewart & Lloyd Ltd | - | 886 Hay Street | Smith 1½ H.P. | P 1039 | Perth Municipality | 1919 |
| Stewart & Lloyds | - | 886 Hay Street | Triumph 3½ H.P. Motorcycle | P 112 | Perth Municipality | 1916 |
| Stewart & Lloyds | - | 886 Hay Street, Perth | Bean | 13390 | Metro Private Car | 1926-27 |
| Stewart & Lloyds | - | 886 Hay Street, Perth | Bean | 13390 | Metro Private Car | 1927-28 |
| Stewart & Lloyds Ltd | - | Hay Street, Perth | Leyland Wagon | 15020 | Metro Private Car | 1927-28 |
| Stewart & Rinaldi | - | MacDonald Street | Rugby | KMC 152 | Kalgoorlie Municipal Council | 1925-26 |
| Stewart & Rinnaldi | - | 168 McDonald Street | Rugby | KMC 152 | Kalgoorlie Municipality | 1924-25 |
| Stewart & Wehl | - | Bonny Downs | Ford | NU ● 3 | Nullagine Road Board | 1924-25 |
| Stewart & Wehl | - | Bryah Station | Overland | MK ● 17 | Meekatharra Road Board | 1925-26 |
| Stewart & Wehl | - | Bryah Station | Ford | MK ● 31 | Meekatharra Road Board | 1925-26 |
| Stewart & Wehl | - | Bryah Station | Overland | MK ● 16 | Meekatharra Road Board | 1926-27 |
| Stewart & Wehl | - | Bonny Downs | Ford | NU ● 1 | Nullagine Road Board | 1926-27 |
| Stewart & Wehl | - | Bryah Station | Overland | MK ● 16 | Meekatharra Road Board | 1927-28 |
| Stewart & Wehl | - | Meekatharra | Ford | MK ● 31 | Meekatharra Road Board | 1927-28 |
| Stewart & Wehl | - | Bonney Downs | Ford | NU ● 1 | Nullagine Road Board | 1927-28 |
| Stewart & Whyte | - | Fitzgerald Street, Northam | Ford | N 81 | Northam Municipality | 1923-24 |
| Stewart and Lloyd | - | 886 Hay Street, Perth | Dodge | 2345 | Metro Private Car | 1923-24 |
| Stewart and Lloyd | - | 886 Hay Street, Perth | Dodge | 2766 | Metro Private Car | 1923-24 |
| Stewart and Wehl | - | Bonny Downs | Ford | NU ● 1 | Nullagine Road Board | 1923-24 |
| Stewart, General Motors Ltd | R. M. F. | Cottesloe Beach | Chevrolet | 12600 | Metro Private Car | 1927-28 |
| Stewarts & Lloyd | - | 886 Hay Street, Perth | Dodge | 2345 | Metro Private Car | 1922-23 |
| Stewarts & Lloyds | - | 886 Hay Street | Triumph 3½ H.P. Motorcycle | P 112 | Perth Municipality | 1915 |
| Stewarts & Lloyds | - | 886 Hay Street, Perth | Maxwell | 6750 | Metro Private Car | 1925-26 |
| Stewarts & Lloyds | - | 886 Hay Street, Perth | Maxwell | 6750 | Metro Private Car | 1926-27 |
| Stewarts & Lloyds | - | 886 Hay Street, Perth | Maxwell | 6750 | Metro Private Car | 1927-28 |
| Stibbs | A. J. | Collie | Dodge | CO ● 66 | Collie Road Board | 1926-27 |
| Sticht | R. C. | Palmerston Street, Cottesloe Beach | Buick | 2433 | Metro Private Car | 1925-26 |
| Sticht | R. C. | Cottesloe Beach | Buick | 2433 | Metro Private Car | 1926-27 |
| Sticht | R. C. | OPalmerston Street, Cottesloe Beach | Ford | 2433 | Metro Private Car | 1927-28 |
| Sticken | W. J. | Kuringup | Overland | KT ● 47 | Kent Road Board | 1926-27 |
| Sticken | W. J. | Kuringup | Chevrolet | KT ● 47 | Kent Road Board | 1927-28 |
| Stickland | A. E. | Wogan Hill | Dodge | WB ● 48 | Wongan-Ballidu Road Board | 1927-28 |
| stickland | C. G. | 234 Saint George's Terrace, Perth | Citroen | 4348 | Metro Private Car | 1927-28 |
| Stidworthy | F. H. | 26 Parker Street, Perth | Ford | 13243 | Metro Private Car | 1926-27 |
| Stidworthy | F. H. | 26 Parker Street, Perth | Ford | 13243 | Metro Private Car | 1927-28 |
| Stidworthy | F. W. | Jarring | Ford | LG ● 77 | Lake Grace Road Board | 1925-26 |
| Stidworthy | F. W. | Jarring | Ford | LG ● 77 | Lake Grace Road Board | 1926-27 |
| Stidworthy | R. | Suburban Road, South Perth | Ford | 2201 | Metro Private Car | 1922-23 |
| Stidworthy | R. | 130 Suburban Road, South Perth | Essex | 5115 | Metro Private Car | 1924-25 |
| Stidworthy | Roy | 130 Suburban Road, South Perth | Essex | 3311 | Metropolitan Hire and Trade Cars | 1923-24 |
| Stiepwich | N. | Market Street, Guildford | Chevrolet | 8627 | Metro Private Car | 1925-26 |
| Stiepwich | N. | Market Street, Guildford | Chevrolet | 8627 | Metro Private Car | 1926-27 |
