| Massey-Crosse | C. | 134 Barrack Street, Perth | Ford | 2290 | Metro Private Car | 1923-24 |
| Massingham | C. W. | Kellerberrin | Rugby | KE ● 149 | Kellerberrin Road Board | 1925-26 |
| Massingham | C. W. | Kellerberrin | Rugby | KE ● 149 | Kellerberrin Road Board | 1926-27 |
| Massingham | C. W. | Kellerberrin | Rugby | KE ● 149 | Kellerberrin Road Board | 1927-28 |
| Massingham | L. B. | Kellerberrin | Dodge 20 H.P. | KE 17 | Kellerberrin Road Board | 1919 |
| Massingham | L. B. | Kellerberrin | Essex | KE ● 17 | Kellerberrin Road Board | 1922-23 |
| Massingham | L. B. | Kellerberrin | Essex | KE ● 17 | Kellerberring Road Board | 1923-24 |
| Massingham | L. B. | Woolundra | Overland Truck | KE ● 125 | Kellerberrin Road Board | 1925-26 |
| Massingham | L. B. | Kellerberrin | Willys-Knight | KE ● 151 | Kellerberrin Road Board | 1925-26 |
| Massingham | L. B. | Kellerberrin | Overland Truck | KE ● 125 | Kellerberrin Road Board | 1926-27 |
| Massingham | L. B. | Kellerberrin | Willys-Knight | KE ● 151 | Kellerberrin Road Board | 1926-27 |
| Massingham | L. B. | Kellerberrin | Overland Truck | KE ● 125 | Kellerberrin Road Board | 1927-28 |
| Massingham | L. B. | Kellerberrin | Willys-Knight | KE ● 151 | Kellerberrin Road Board | 1927-28 |
| Massingham | L. V. | Kellerberrin | Essex | KE ● 17 | Kellerberrin Road Board | 1924-25 |
| Master | C. | Northam | Ford | N ● 224 | Northam Road Board | 1926-27 |
| Masters | A. | 182 Duke Street, East Fremantle | Overland | 12286 | Metro Private Car | 1926-27 |
| Masters | A. | 253 Heytesbury Road, Subiaco | Overland | 12286 | Metro Private Car | 1927-28 |
| Masters | A. C | Wagin | essex | W ● 55 | Wagin Road Board | 1926-27 |
| Masters | A. C | Nallian | Chevolet | W ● 60 | Wagin Road Board | 1926-27 |
| Masters | A. C. | Wagin | Ford | W ● 60 | Wagin Road Board | 1924-25 |
| Masters | A. C. | Nallian | Ford | W ● 60 | Wagin Road Board | 1925-26 |
| Masters | A. C. | Wagin | Essex | W ● 55 | Wagin Road Board | 1927-28 |
| Masters | C. | - | Ford 20 H.P. | ME 18 | Meckering Road Board | 1916 |
| Masters | C. | Northam | Car | N ● 24 | Northam Road Board | 1917-18 |
| Masters | C. | Northam | Ford | N 24 | Northam Road Board | 1919 |
| Masters | C. | Northam | Durant | N ● 23 | Northam Road Board | 1922-23 |
| Masters | C. | - | Willys-Knight | N ● 24 | Northam Road Board | 1927-28 |
| Masters | C. | Northam | Ford Truck | N ● 227 | Northam Road Board | 1927-28 |
| Masters | H. G. | Northam | Dodge | N ● 238 | Northam Road Board | 1926-27 |
| Masters | H. J. W. | Byford | Rugby | A-K ● 139 | Armadale-Kelmscott Road Board | 1927-28 |
| Masters | Mrs E. L. | Chidlcw Street | Dodge | N 210 | Northam Municipality | 1927-28 |
| Masters | Walter H. | Glenforrest | New Hudson | GE ● 24 | Greenmount Road Board | 1919 |
| Masters Walter | H. | Mundaring Weir | Triumph 3 H.P. Motorcycle | GE ● 25 | Greenmount Road Board | 1922-23 |
| Masterson | Rev J. | Toodyay | Ford 20 H.P. | T ● 21 | Toodyay Road Board | 1917-18 |
| Masterson | Rev. J. | Toodyay | Ford 20 H.P. | T ● 21 | Toodyay Road Board | 1919 |
| Masterson | Rev. T. | 211 Aberdeen Street, West Perth | Fiat | 5630 | Metro Private Car | 1926-27 |
| Masterson | Rev. T. | 1 Langsford Street, Claremont | Fiat | 5630 | Metro Private Car | 1927-28 |
| Masterton | Rev. | Langsford Street | - | C 8 | Claremont Municipality | 1915 |
| Masterton | Rev. | Langsford Street | - | C 8 | Claremont Municipality | 1916 |
| Masterton | Rev. | Langsford Street, Claremont | Motorcycle | C 8 | Claremont Municipality | 1917-18 |
| Masterton | Rev. J. | Toodyay | Ford 20 H.P. | T 21 | Toodyay Road Board | 1916 |
| Masterton | Thomas | Langsford Street, Claremont | - | C 8 | Claremont Municipality | 1919 |
| Mastin | F. | Albany | Fiat | A 12 | Municipality of Albany | 1926-27 |
| Mate | A. | 12 Kings Park Road, North Perth | Dodge | 11049 | Metro Private Car | 1927-28 |
| Mathea | Miss P. | State School Yilliminning | Chevrolet | 13412 | Metro Private Car | 1927-28 |
| Matheison | Edward | - | Ford 20 H.P. | K 1 | Kalgoorlie Road Board | 1916 |
| Mather | A. | Gnowangerup | Buick | GN ● 91 | Gnowangerup Road Board | 1925-26 |
| Mather | A. | Gnowangerup | Buick | GN ● 91 | Gnowangerup Road Board | 1926-27 |
| Mather | A. | Gnowangerup | Buick | GN ● 91 | Gnowangerup Road Board | 1927-28 |
| Mather | E. Mrs | 72 Outram Street, West Perth | Dodge | 1012 | Metro Private Car | 1923-24 |
