| McVeith | A. | Wickepin | Ford Truck | WK ● 225 | Wickepin Road Board | 1927-28 |
| McVickers | D. F. | Nannup | Ford 20 H.P. | BL ● 6 | Lower Blackwood Road Board | 1917-18 |
| McWaters | G. C. | Cunderdin | Dodge | ME ● 12 | Meckering Road Board | 1925-26 |
| McWaters | G. C. | Cunderdin | Buick | ME ● 37 | Meckering Road Board | 1925-26 |
| McWaters | G. C. | Cunderdin | Buick | ME ● 37 | Meckering Road Board | 1926-27 |
| McWaters | G. C. | Cunderdin | Dodge | ME ● 12 | Meckering Road Board | 1927-28 |
| McWaters | G. C. | Cunderdin | Buick | ME ● 37 | Meckering Road Board | 1927-28 |
| McWhirter | A. E. | Kellerberrin | Ford | KE ● 82 | Kellerberrin Road Board | 1927-28 |
| McWhirter | G. | Kellerberrin | Fiat | KE ● 191 | Kellerberrin Road Board | 1925-26 |
| McWhirter | G. | Kellerberrin | Fiat | KE ● 191 | Kellerberrin Road Board | 1926-27 |
| McWhirter | G. | Kellerberrin | Fiat | KE ● 191 | Kellerberrin Road Board | 1927-28 |
| McWhirter | G. A. | Kellerberrin | Fiat | KE ● 273 | Kellerberrin Road Board | 1926-27 |
| McWhirter | G. A. | Kellerberrin | Fiat | KE ● 273 | Kellerberrin Road Board | 1927-28 |
| McWhirter | S. B. | Armadale | Triumph 3½ H.P. Motorcycle | A-K ● 4 | Armadale-Kelmscott Road Board | 1922-23 |
| McWilliams | J. | Lake Grace | Ford Truck | LG ● 55 | Lake Grace Road Board | 1927-28 |
| Meachem | A. F. | Meckering | Overland | ME ● 287 | Meckering Road Board | 1926-27 |
| Meachem | A. F. | Meckering | Overland | ME ● 287 | Meckering Road Board | 1927-28 |
| Meathrel | H. C. | 254 Rokeby Road, Subiaco | Chevrolet | 14422 | Metro Private Car | 1927-28 |
| Meckenstock | J. A. | 79 Fairfield Street, Mount Hawthorn | Morris Cowley | 1046 | Metro Private Car | 1927-28 |
| Meckerin Co-op. | - | Meckering | Rugby | ME ● 97 | Meckering Road Board | 1924-25 |
| Meckering Co | - | Meckering | Rugby | ME ● 183 | Meckering Road Board | 1925-26 |
| Meckering Co-op. | - | Meckering | Rugby | ME ● 183 | Meckering Road Board | 1926-27 |
| Meckering Co-op. | - | Meckering | Rugby | ME ● 183 | Meckering Road Board | 1927-28 |
| Meckering Road Board | - | Cunderdin | Overland | ME ● 50 | Meckering Road Board | 1922-23 |
| Meckering Road Board | - | Cunderdin | Overland | ME ● 50 | Meckering Road Board | 1923-24 |
| Meckering Road Board | - | Cunderdin | Overland | ME ● 50 | Meckering Road Board | 1924-25 |
| Meckering Road Board | - | Cunderdin | Overland | ME ● 50 | Meckering Road Board | 1925-26 |
| Meckering Road Board | - | Cunderdin | Chevrolet | ME ● 27 | Meckering Road Board | 1926-27 |
| Meckering Road Board | - | Cunderdin | Overland | ME ● 50 | Meckering Road Board | 1926-27 |
| Meckering Road Board | - | Cunderdin | Chevrolet | ME ● 27 | Meckering Road Board | 1927-28 |
| Meecham | Robert | Mount Barker | Chevrolet | PL ● 149 | Plantagenet Road Board | 1927-28 |
| Meidrum | T. | Kelmscott | Dodge | 3628 | Metro Hire or Trade | 1925-26 |
| MeKey | N. | Goomalling | Ford | GO ● 22 | Goomalling Road Board | 1922-23 |
| Meldrum | A. | Mount Baker | Overland | PL ● 32 | Plantagenet Road Board | 1924-25 |
| Meldrum | A. | Mount Barker | Overland | PL ● 32 | Plantagenet Road Board | 1925-26 |
| Meldrum | Alex. | Mount Barker | Overland | PL ● 32 | Plantagenet Road Board | 1924-25 |
| Meldrum | T. | Kelmscott | Graham Bros | 3627 | Metro Hire or Trade | 1924-25 |
| Meldrum | T. | Kelmscott | Dodge | 3628 | Metro Hire or Trade | 1924-25 |
| Meldrum | Thos. | Kelmscott | Graham Truck | A-K ● 74 | Armadale-Kelmscott Road Board | 1924-25 |
| Melenke | A. | Dumbleyung | B.S.A. 4½ H.P. Motorcycle | DU ● 15 | Dumbleyung Road Board | 1919 |
| Mellowes | A. | Holyoake | Chevrolet | MY ● 101 | Murray Road Board | 1926-27 |
| Mellowes | A. | Holyoake | Chevrolet | MY ● 101 | Murray Road Board | 1927-28 |
| Mellows | E. J. | 17 Woodsome Street, Mount Lawley | Studebaker | 1338 | Metro Private Car | 1926-27 |
| Melos | P. | Hamel | Chevrolet Truck | DK ● 60 | Drakesbrook Road Board | 1927-28 |
| Melrose | Aubrey G. | Keane Street, Cottesloe | A.J.S. | 112 | Metro Motorcycle | 1922-23 |
| Mengler | G. | - | Studebaker 20 H.P. | KMC 25 | Kalgoorlie Municipality | 1915 |
| Mengler | G. | Campbell Street | Studebaker 20 H.P. | KMC 25 | Kalgoorlie Municipality | 1916 |
| Mengler | G. | Goldsworthy Road, Claremont | Studebaker | 2423 | Metro Private Car | 1922-23 |
| Mengler | Gus. | Goldsworthy Road, Claremont | Studebaker | 2423 | Metro Private Car | 1923-24 |
| Mengler | Gus. | Goldsworthy Road, Claremont | Studebaker | 2423 | Metro Private Car | 1924-25 |
