| Isbister Bros | - | Williams | Ford | WL ● 14 | Williams Road Board | 1925-26 |
| Isbister Bros. | - | Williams | Ford 15 H.P. | WL 14 | Williams Road Board | 1916 |
| Isbister Bros. | - | Williams | Ford 10 H.P. | WL ● 14 | Williams Road Board | 1923-24 |
| Isbister Brothers | - | Williams | Ford | WL ● 14 | Williams Road Board | 1924-25 |
| Islam | Mrs J | 10 Almondbury Road, Mount Lawley | Essex | 4544 | Metro Private Car | 1924-25 |
| Islam | Mrs J. | 10 Almondsbury Road, Mount Lawley | Essex | 4544 | Metro Private Car | 1925-26 |
| Isle | F. | - | Vulcan Truck | M ● 78 | Moora Road Board | 1925-26 |
| Isle | F. H. | - | Vulcan Truck | M ● 78 | Moora Road Board | 1926-27 |
| Isle | F. H. | - | Vulcan Truck | M ● 78 | Moora Road Board | 1927-28 |
| Isle | J. | Moora | Chevrolet | M ● 201 | Moora Road Board | 1927-28 |
| Ison | S. | - | Overland | N ● 79 | Northam Road Board | 1927-28 |
| Issacman | J. | Perth | B.S.A. 4¼ H.P. Motorcycle | GN 33 | Geraldton Municipality | 1916 |
| Issell | F. M. | Gregory Street, Geraldton | Hupmobile 26 H.P. | GN 6 | Geraldton Municipality | 1922-23 |
| Issell | F. M. | Gregory Street, Geraldton | Hupmobile 26 H.P. | GN ● 6 | Geraldton Municipality | 1923-24 |
| Ittershagen | C. | Railway Road, West Perth | Dealers | 20277 | Metro Dealers Car | 1927-28 |
| Ittershagen | H. C. | Railway Road, West Subiaco | Dealers | 20227 | Metro Dealers Car | 1927-28 |
| Ivanhoe G. Corporation | - | Kalgoorlie | Sunbeam 12-16 H.P. | K ● 15 | Kalgoorlie Road Board | 1917-18 |
| Ivanhoe Gold Corpn. | - | Fimiston | Sunbeam 15 H.P. | K ● 15 | Kalgoorlie Road Board | 1922-23 |
| Ivanhoe Gold Corpn. | - | Fimiston | Hupmobile | K ● 20 | Kalgoorlie Road Board | 1922-23 |
| Ivanhoe Gold Corporation | - | Hannan Street, Kalgoorlie | Ford 20 H.P. | K 31 | Kalgoorlie Road Board | 1916 |
| Ivanhoe Gold Corporation | - | Hannan Street, Kalgoorlie | Ford 20 H.P. | K ● 31 | Kalgoorlie Road Board | 1917-18 |
| Ivanhoe Gold Corporation | - | Kalgoorlie | Sunbeam 16 H.P. | K ● 15 | Kalgoorlie Road Board | 1919 |
| Ivanhoe Gold Corporation | - | Hannan Street | Ford 20 H.P. | K ● 31 | Kalgoorlie Road Board | 1919 |
| Ivanhoe Gold Corporation | - | Fimiston | Fiat | K ● 15 | Kalgoorlie Road Board | 1923-24 |
| Ivanhoe Gold Corporation | - | Fimiston | Hupmobile | K ● 20 | Kalgoorlie Road Board | 1923-24 |
| Ivanhoe Gold Mines | - | Fimiston | Overland 24 H.P. | K ● 31 | Kalgoorlie Road Board | 1922-23 |
| Ivanilice Corporation | G. | Kalgoorlie | Sunbeam 12- 16 H.P. | K 15 | Kalgoorlie Road Board | 1916 |
| Ive | - | Eleanor Street | Ford 20 H.P. | GN 15 | Geraldton Municipality | 1919 |
| Ive | E. W. | - | Ford 20 H.P. | GN 15 | Geraldton Municipality | 1915 |
| Ive | E. W. | Geraldton | Hupmobile 16 H.P. | GN 27 | Geraldton Municipality | 1916 |
| Ive | E. W. | - | Ford 24 H.P. | GN 4 | Geraldton Municipality | 1917-18 |
| Ive | E. W. | - | Buick 18 H.P. | GN 27 | Geraldton Municipality | 1917-18 |
| Ive | E. W. | - | Ford 22½ H.P. Motorcycle | GN 47 | Geraldton Municipality | 1917-18 |
| Ive | E. W. | - | Studebaker 24 H.P. | GN 4 | Geraldton Municipality | 1919 |
| Ive | E. W. | - | Buick 18 H.P. | GN 27 | Geraldton Municipality | 1919 |
| Ive | R. | - | Ford | P ● 11 | Perth Road Board | 1919 |
| Ive | R. G. | 4 George Street, Maylands | Magnet 8 H.P. | P 1231 | Perth Municipality | 1919 |
| Ive | R. G. | George Street, Maylands | Hupmobile | 3097 | Metropolitan Hire and Trade Cars | 1923-24 |
| Ive | R. G. | 4 George Street, Maylands | Swift | 5955 | Metro Private Car | 1924-25 |
| Ive | R. G. | 4 George Street, Maylands | Swift | 5955 | Metro Private Car | 1925-26 |
| Ives | A. | 33 Grosvenour Road, Mount Lawley | Hupmobile | 6497 | Metro Private Car | 1924-25 |
| Ives | D. | St. Ives | Ford | CG ● 35 | Coolgardie Road Board | 1924-25 |
| Ives | D. | St. Ives | Ford | CG ● 35 | Coolgardie Road Board | 1925-26 |
| Ives | D. | St. Ives | Ford | CG ● 35 | Coolgardie Road Board | 1926-27 |
| Ives | E. | Maylands | Flanders 20 H.P. | ML 37 | Perth Road Board | 1915 |
| Ives | E. | George Street, Maylands | Flanders 20 H.P. | P 37 | Perth Municipality | 1916 |
| Ives | E. A. | 15 Rookwood Street, Mount Lawley | Singer | 14856 | Metro Private Car | 1927-28 |
| Ives | Mrs F. | 33 Grosvenor Road, North Perth | Nash | 13737 | Metro Private Car | 1926-27 |
| Ives | R. | George Street, Maylands | Ford 15 H.P. | P ● 11 | Perth Road Board | 1917-18 |
| Ives | R. G. | 4 Saint George's Terrace, Perth | Dodge | 2497 | Metro Private Car | 1922-23 |
