| Maynard | F. L. | Northern Gully | Studebaker | CU ● 5 | Upper Chapman Road Board | 1924-25 |
| Maynard | George | Kondinin | Chevrolet | KN ● 9 | Kondinin Road Board | 1925-26 |
| Maynard | H. J. | 6 Hooper Street, Perth | Dodge | 6249 | Metro Private Car | 1924-25 |
| Maynard | H. J. | 6 Hooper Street, West Perth | Dodge | 6249 | Metro Private Car | 1925-26 |
| Maynard | H. J. | 6 Hooper Street, West Perth | Dodge | 6249 | Metro Private Car | 1926-27 |
| Maynard & Evans | - | Doodenanning | Graham Truck | Q ● 107 | Quairading Road Board | 1927-28 |
| Mayne | R. D. | View Road, Maylands | Chevrolet | 9162 | Metro Private Car | 1925-26 |
| Mayne | R. D. | 135 8th Avenue, Maylands | Chevrolet | 9162 | Metro Private Car | 1926-27 |
| Mayne | R. D. | 135 8th Avenue, Maylands | Chevrolet | 9162 | Metro Private Car | 1927-28 |
| Mayo | J. | Manjimup | Chevrolet | WA ● 255 | Manjimup Road Board | 1927-28 |
| Mayo | M. | 828 Hay Street, Perth | Morris-Cowley | 13569 | Metro Private Car | 1926-27 |
| Mayo | M. E. | 828 Hay Street, Perth | Morris-Cowley | 13569 | Metro Private Car | 1927-28 |
| Mayor | Albert | 609 Wellington Street, Perth | Overland 15 H.P. | P 97 | Perth Municipality | 1916 |
| Mayor | Albert | 609 Wellington Street | Buick 16 H.P. | P 97 | Perth Municipality | 1917-18 |
| Mayor | Albert | Saint George's House | Overland 15 H.P. | P 97 | Perth Municipality | 1919 |
| Mayor | G. | Northampton | Grey | NR ● 101 | Northampton Road Board | 1925-26 |
| Mayrhofer | Dr | Three Springs | Ford | CA ● 267 | Carnamah Road Board | 1927-28 |
| Mayros | G. S. | Quairading | Arrol-Johnston | Q ● 55 | Quairading Road Board | 1925-26 |
| Mays | W. A. | Greenbushes | Ford | GR ● 17 | Greenbushes Road Board | 1927-28 |
| Mazzuchelli | G. H. | Lyall's Mill | Ford | CO ● 84 | Collie Road Board | 1926-27 |
| Mazzuchelli | H. J. | Lyall's Mill | Rugby | CO ● 179 | Collie Road Board | 1927-28 |
| Mazzuchelli | M. | - | Buick | CU ● 101 | Upper Chapman Road Board | 1925-26 |
| Mazzuchelli | M. | - | Ford Truck | CU ● 25 | Upper Chapman Road Board | 1926-27 |
| Mazzuchelli | M. | - | Buick | CU ● ● 101 | Upper Chapman Road Board | 1926-27 |
| Mazzuchelli | M. | - | Ford Truck | CU ● 25 | Upper Chapman Road Board | 1927-28 |
| Mazzuchelli | M. | - | Buick | CU ● 101 | Upper Chapman Road Board | 1927-28 |
| Mazzuchelli | M. E. | 247 Thomas Street, Subiaco | Chrysler | 14828 | Metro Private Car | 1927-28 |
| Mc Carthy | Gerald V. P. | Armadale | Ford | A-K ● 26 | Armadale-Kelmscott Road Board | !922-23 |
| Mc Conkey | J. | Oakabella | Dodge | NR ● 39 | Northampton Road Board | 1926-27 |
| Mc Donald | J. | Corrigin | Ford 20 H.P. | CR ● 3 | Corrigin Road Board | 1919 |
| Mc Donald | J. A. | Tambellup | Buick 20 (now destroyed by fire) | T 3 | Tambellup Road Board | 1915 |
| Mc Donald | R. H. | Clydesdale Street | Perry 8 H.P. | VP 15 | Victoria Park Municipality | 1915 |
| Mc Dowall | F. G. | 158 Royal Street, East Perth | Citroen | 2788 | Metro Private Car | 1927-28 |
| Mc Gowan | P. | 138 Lake Street, Perth | Ford Wagon | 3539 | Metro Hire or Trade | 1925-26 |
| Mc Gregor | J. S. | Beverley | B.S.A. | BE 21 | Beverley Road Board | 1916 |
| Mc Innes | J. A. | Wagin | Dodge | W ● 12 | Wagin Road Board | 1922-23 |
| Mc Kee | Mrs I. | Bedford Hotel, Murray Street, Perth | Morris-Oxford | 8673 | Metro Private Car | 1926-27 |
| Mc Kinley | E. M. | 41 Permont Street, North Perth | Citroen | 5804 | Metro Private Car | 1924-25 |
| Mc Lennan | G. E. | Quairading | Chevrolet Truck | Q ● 203 | Quairading Road Board | 1926-27 |
| Mc Lennan | J. | Mount Stirling | Bean | Q ● 181 | Quairading Road Board | 1926-27 |
| Mc Leod | W. A. | 28 Cheetham Street | Sunbeam 16 H.P. | KMC 3 | Kalgoorlie Municipality | 1916 |
| Mc Queen | Wm. A. | 48 Francis Street, Perth | Ford | 942 | Metro Private Car | 1923-24 |
| Mc Waters | G. C. | 182, Guildford Road, Maylands | Dodge | 1054 | Metro Private Car | 1924-25 |
| McAdam | R. O. | 37 Colin Crescent, Perth | Overland | 308 | Metro Private Car | 1922-23 |
| McAdam | R. O. | 37 Colin Crescent, Perth | Overland | 308 | Metro Private Car | 1923-24 |
| McAdam | R. O. | 37 Colin Crescent, West Perth | Overland | 308 | Metro Private Car | 1926-27 |
| McAieer | Dr J. A. | Three Springs | Dodge | CA ● 34 | Carnamah Road Board | 1926-27 |
| McAlear | Dr J. | Three Springs | Dodge | CA ● 18 | Carnamah Road Board | 1924-25 |
| McAleer | Dr J | Three Springs | Dodge | MI ● 24 | Mingenew Road Board | 1922-23 |
| McAleer | Dr J | Three Springs | Harley Sport Motorcycle | MI ● 3 | Mingenew Road Board | 1922-23 |
