| Yellow Cab Co W.A. Ltd | - | Perth | Yellow Cab | 10727 | Yellow Cab Co. | 1927-28 |
| Yellow Cab Co W.A. Ltd | - | Perth | Yellow Cab | 10628 | Yellow Cab Co. | 1927-28 |
| Yellow Cab Co W.A. Ltd | - | Perth | Yellow Cab | 10629 | Yellow Cab Co. | 1927-28 |
| Yellow Cab Co W.A. Ltd | - | Perth | Yellow Cab | 10630 | Yellow Cab Co. | 1927-28 |
| Yellow Cab Co W.A. Ltd | - | Perth | Yellow Cab | 10631 | Yellow Cab Co. | 1927-28 |
| Yellow Cab Co W.A. Ltd | - | Perth | Yellow Cab | 10632 | Yellow Cab Co. | 1927-28 |
| Yellow Cab Co W.A. Ltd | - | Perth | Yellow Cab | 10650 | Yellow Cab Co. | 1927-28 |
| Yeloon | A. | 25 Farmer Street, North Perth | Overland | 6283 | Metro Private Car | 1926-27 |
| Yelverton | V. A. | Mullewa | Chevrolet | MW ● 27 | Mullewa Road Board | 1924-25 |
| Yelverton | V. A. | Mullewa | Chevrolet | MW ● 27 | Mullewa Road Board | 1925-26 |
| Yelverton | V. A. | Mullewa | Chevrolet | MW ● 27 | Mullewa Road Board | 1926-27 |
| Yelverton | V. A. | Mullewa | Chevrolet | MW ● 27 | Mullewa Road Board | 1927-28 |
| Yench | F. | 41 Gray Street, Fremantle | Overland | 9796 | Metro Private Car | 1926-27 |
| Yench | Ted | 41 Gray Street, Fremantle | Overland | 9796 | Metro Private Car | 1927-28 |
| Yeo | Elizabeth Mrs | 36 Mount Street, Perth | Hupmobile | 4409 | Metro Private Car | 1923-24 |
| Yeo | Mrs E | 36 Mount Street, Perth | Hupmobile | 4409 | Metro Private Car | 1924-25 |
| Yeo | Mrs E | 36 Mount Street, Perth | Hupmobile | 4409 | Metro Private Car | 1927-28 |
| Yeo | Mrs E. | 36 Mount Street, Perth | Hupmobile | 4409 | Metro Private Car | 1925-26 |
| Yeo | Mrs E. | 36 Mount Street, Perth | Hupmobile | 4409 | Metro Private Car | 1926-27 |
| Yeo | S. J. | 36 Mount Street | Ford 15 H.P. | P 220 | Perth Municipality | 1915 |
| Yeo | S. J. | 36 Mount Street | Ford 20 H.P. | P 220 | Perth Municipality | 1916 |
| Yeo | S. J. | 36 Mount Street, Perth | Ford | 788 | Metro Private Car | 1923-24 |
| Yeo. | S. J. | Mount Street, Perth | Ford | 788 | Metro Private Car | 1922-23 |
| Yeomans | E. | Graball | Chevrolet | BK 88 | Bruce Rock Road Board | 1923 - 1924 |
| Yeomans | E. | Graball | Chevrolet | NB ● 88 | Narembeen Road Board | 1924-25 |
| Yeomans | E. | Narembeen | Hupmobile | NB ● 17 | Narembeen Road Board | 1925-26 |
| Yeomans | E. | Narembeen | Hupmobile | NB ● 17 | Narembeen Road Board | 1926-27 |
| Yeomans | E. | Narembeen | Hupmobile | NB ● 17 | Narembeen Road Board | 1927-28 |
| Yerilla Station, Ltd | - | Yerilla | Chevrolet | MN ● 32 | Menzies Road Board | 1925-26 |
| Yerilla Station, Ltd | - | Yerilla | Chevrolet | MN ● 32 | Menzies Road Board | 1927-28 |
| Yerilla Station, Ltd | - | Yerilla | Chevrolet | MN ● 83 | Menzies Road Board | 1927-28 |
| Yerilla Station, Ltd | C. N. | Kookynie | Ford | MN ● 33 | Menzies Road Board | 1925-26 |
| Yeun | Hoy Poy | 295 James Street, Perth | Buick | 2866 | Metro Private Car | 1924-25 |
| Yewnham | S. H. | 183 Lincoln Street | Bradbury 4½ H.P. Motorcycle | P 309 | Perth Municipality | 1915 |
| Yews | A. | St.Siban's Road, Kalgoorlie | Calcott | KMC 67 | Kalgoorlie Municipal Council | 1926-27 |
| Yews | A. | StreetSiban's Road, Kalgoorlie | Calcott | KMC 67 | Kalgoorlie Municipal Council | 1927-28 |
| Yeyte Bros | - | Hutt | Chevrolet | NR ● 117 | Northampton Road Board | 1925-26 |
| Yilgarn Butchering Co | - | Southern Cross | Ford 20 H.P. | SX 11 | Southern Cross Municipality | 1917-18 |
| Yilgarn Buthering Co | - | Southern Cross | Ford 20 H.P. | SX 11 | Southern Cross Municipality | 1916 |
| Yilliminning-Kondinin Co-op. | - | Dudinin | Ford | RE ● 71 | Roe Road Board | 1925-26 |
| Yilliminning-Kondinin Co-op. | - | Dudinin | Ford | RE ● 78 | Roe Road Board | 1925-26 |
| Yilliminning-Kondinin Co-op. | - | Dudinin | Ford Truck | RE ● 79 | Roe Road Board | 1925-26 |
| Yilliminning-Kondinin Co-op. | - | Dudinin | Chevrolet Truck | RE ● 116 | Roe Road Board | 1925-26 |
| Yocklun | Charles | Toodyay | Oakland | T ● 156 | Toodyay Road Board | 1927-28 |
| Yoogh | Ah. | 54 Market Street, Fremantle | Buick | 6862 | Metro Private Car | 1927-28 |
| York | A. | 7 Loftus Street, Claremont | Ford Wagon | 11033 | Metro Private Car | 1926-27 |
| York | A. | 7 Loftus Street, Claremont | Ford Wagon | 9960 | Metro Private Car | 1927-28 |
| York | A. E. | Watheroo | Chevrolet | M ● 107 | Moora Road Board | 1926-27 |
| York | E. J | Wongan Hills | Oldsmobile | WB ● 20 | Wongan-Ballidu Road Board | 1926-27 |
| York | E. J. | Wogan Hill | Oldsmobile | WB ● 20 | Wongan-Ballidu Road Board | 1927-28 |
