| Melvin | Wm. J. | 92 Angrove Street, North Perth | B.S.A. | 1125 | Metro Motorcycle | 1922-23 |
| Melvin & Co | - | Fitzgerald Street | Motorcycle | N 15 | Northam Municipality | 1915 |
| MeManus | S. | Goomalling | Ford | GO ● 8 | Goomalling Road Board | 1922-23 |
| Membrey | E. W. | - | Chevrolet | N ● 98 | Northam Road Board | 1927-28 |
| Memory | James | 17 Wright Street, Fremantle | Citroen | 5124 | Metro Private Car | 1927-28 |
| Mempes | C. R. | Bruce Rock | Chevrolet | BK ● 312 | Bruce Rock Road Board | 1927-28 |
| Mempes | Charles | Williams | Chevrolet | WL ● 19 | Williams Road Board | 1924-25 |
| Mempes | Charles | Williams | Chevrolet | WL ● 19 | Williams Road Board | 1925-26 |
| Mempes | Charles | Williams | Chevrolet | WL ● 19 | Williams Road Board | 1926-27 |
| Menae | F. | C/o W.A. Farmers Wellington Street, Perth | Chevrolet | 11220 | Metro Private Car | 1927-28 |
| Menchin | W. | Toodyay | Buick | T ● 74 | Toodyay Road Board | 1926-27 |
| Menck | C. | Millbrook | Dodge | A ● 10 | Albany Road Board | 1926-27 |
| Menck | C. | Millbrook | Dodge | A ● 10 | Albany Road Board | 1927-28 |
| Mendalawitz | M. | 26 Burt Street, North Perth | Chevrolet | 13394 | Metro Private Car | 1926-27 |
| Mendelawitz | D. | Carnarvon | Dodge | CN 17 | Carnarvon Municipal Council | 1927-28 |
| Mendelawitz | M. | 59 First Avenue, Mount Lawley | Buick | 4955 | Metro Private Car | 1927-28 |
| Menghine | M. | Yarloop | Chevrolet | H ● 232 | Harvey Road Board | 1927-28 |
| Mengler | F. | Victoria Avenue, Claremont | - | C 114 | Claremont Municipality | 1919 |
| Mengler | G. | - | Studebaker 20 H.P. | KMC 25 | Kalgoorlie Municipality | 1915 |
| Mengler | G. | - | Royal Enfield 2½ H.P. Motorcycle | KMC 5 | Kalgoorlie Municipality | 1915 |
| Mengler | G. | Campbell Street | Studebaker 20 H.P. | KMC 25 | Kalgoorlie Municipality | 1916 |
| Mengler | G. | Campbell Street | Royal Enifield 2¾ H.P. Motorcycle | KMC 5 | Kalgoorlie Municipality | 1916 |
| Mengler | G. | Goldsworthy Road, Claremont | Studebaker | 2423 | Metro Private Car | 1922-23 |
| Mengler | G. | 19 Agett Road, Claremont | Hudson | 2423 | Metro Private Car | 1927-28 |
| Mengler | Gus. | Goldsworthy Road, Claremont | Studebaker | 2423 | Metro Private Car | 1923-24 |
| Mengler | Gus. | Goldsworthy Road, Claremont | Studebaker | 2423 | Metro Private Car | 1924-25 |
| Mengler | Gus. | Goldsworthy Road, Claremont | Studebaker | 2423 | Metro Private Car | 1925-26 |
| MeNiel | S. F. | Konnogorring | Ford | GO ● 23 | Goomalling Road Board | 1922-23 |
| Menmuir | David M. | 8 Hope Street, Perth | Essex | 2368 | Metro Private Car | 1927-28 |
| Mennhennett | J. H. | Balingup | Chevrolet | BN ● 8 | Balingup Road Board | 1927-28 |
| Menoalawitz | M. | 26 Burt Street, North Perth | Chevrolet | 13394 | Metro Private Car | 1927-28 |
| Mentiplay | - | - | Ford 16½ H.P. | GN 31 | Geraldton Municipality | 1917-18 |
| Mentiplay | - | - | Hupmobile 20 H.P. | GN 31 | Geraldton Municipality | 1919 |
| Mentiplay | D | Grant Street, Geraldton | Hupmobile | GN 31 | Geraldton Municipality | 1926-27 |
| Mentiplay | D. | Geraldton | Ford 16½ H.P. | GN 31 | Geraldton Municipality | 1916 |
| Mentiplay | D. | Grant Street, Geraldton | Hupmobile | GN 31 | Geraldton Municipality | 1922-23 |
| Mentiplay | D. | Grant Street, Geraldton | Hupmobile | GN ● 31 | Geraldton Municipality | 1923-24 |
| Mentiplay | D. | Grant Street, Geraldton | Hupmobile | GN 31 | Geraldton Municipality | 1924-25 |
| Mentiplay | D. | Grant Street, Geraldton | Hupmobile | GN 31 | Geraldton Municipality | 1925-26 |
| Menzel | Belle Florist | William Street, Perth | Austin | 1592 | Metro Private Car | 1927-28 |
| Menzies | A. Junior | Katanning | Dodge | KA ● 329 | Katanning Road Board | 1927-28 |
| Menzies | A. T. | Narrogin | Overland 19 H.P. | NGN 107 | Narrogin Municipality | 1922-23 |
| Menzies | A. T. | Narrogin | Overload | NGN 107 | Narrogin Municipality | 1923-24 |
| Menzies | A. T. | Narrogin | Overland | NGN 107 | Narrogin Municipality | 1924-25 |
| Menzies | A. T. | Narrogin | Overland | NGN 107 | Narrogin Municipality | 1925-26 |
| Menzies | P. | 40 Beaufort Street | Humberette 7 H.P. | P 30 | Perth Municipality | 1915 |
| Menzies | P. | 7 Fairfield Street, Mount Hawthorn | Citroen | 676 | Metro Private Car | 1922-23 |
| Menzies | P. | 7 Fairfield Street, Mount Hawthorn | Citroen | 676 | Metro Private Car | 1923-24 |
| Menzies | P. | 77 Fairfield Street, Mount Hawthorn | Willy-Knight | 5233 | Metro Private Car | 1924-25 |
| Menzies | Peter | 77 Fairfield Street | Dodge 20 H.P. | P 676 | Perth Municipality | 1919 |
