| Millers Timber & Trading Co Ltd | - | Bunbury | Dodge | BY 125 | Bunbury Municipality | 1927-28 |
| Millership | Mrs | Dumbleyung | Oldsmobile | DU ● 99 | Dumbleyung Road Board | 1926-27 |
| Millet | H. | 92 North Beach Road | Triumph 4½ H.P. Motorcycle | P 409 | Perth Municipality | 1919 |
| Millet | R. C. | 141 Northwood Street, West Leederville | Chevrolet | 12799 | Metro Private Car | 1927-28 |
| Millett | G. H. | 199 James Street, Guildford | Citroen | 16001 | Metro Private Car | 1927-28 |
| Millett | H. | Cnr. North Beach Road & Bisset Street | Chevrolet | 9189 | Metro Private Car | 1925-26 |
| Milligan | G. M. | 24 Victoria Street, Midland Junction | Chevrolet | 12099 | Metro Private Car | 1927-28 |
| Milligan | R. | Mount Lawley | Buick | 2300 | Metro Private Car | 1926-27 |
| Milligan | R. J. | Hay Street | B.S.A. 3½ H.P. Motorcycle | P 661 | Perth Municipality | 1915 |
| Milligan | R. J. | Rookwood Street, Mount Lawley | Buick | 2300 | Metro Private Car | 1922-23 |
| Milligan | R. J. | 41 Rookwood Street, Mount Lawley | Buick | 2300 | Metro Private Car | 1923-24 |
| Milligan | R. J. | 41 Rookwood Street, Mount Lawley | Buick | 2300 | Metro Private Car | 1924-25 |
| Milligan | R. J. | 41 Rookwood Street, Mount Lawley | Buick | 2300 | Metro Private Car | 1925-26 |
| Milligan | R. J. | 41 Rockwood Street, Mount Lawley | Buick | 2300 | Metro Private Car | 1927-28 |
| Milligan | Robert J. | Lloyds Ltd., Perth | Rudge-Multi 3 H.P. | P 523 | Perth Municipality | 1916 |
| Milligan | T. J. | Nedlands | Hupmobile | 2216 | Metro Private Car | 1922-23 |
| Milligan | T. J. | Viewway, Nedlands | Hupmobile | 2216 | Metro Private Car | 1923-24 |
| Milligan | T. J. | Viewway, Nedlands | Hupmobile | 2216 | Metro Private Car | 1924-25 |
| Milligan | T. J. | Viewway Nedlands | Hupmobile | 2216 | Metro Private Car | 1925-26 |
| Milligan | T. J. | Nedlands | Hupmobile | 2216 | Metro Private Car | 1926-27 |
| Milligan | T. J. | Vicwway Nedlands | Hupmobile | 2216 | Metro Private Car | 1927-28 |
| Milligan | W. | Frederick Street | Brough | MJ 10 | Midland Junction Municipality | 1916 |
| Milligan | W. J. | 44 Woodville Street, North Perth | Ford | 6437 | Metro Private Car | 1924-25 |
| Milligan | W. J. | 44 Woodville Street, North Perth | Ford | 7261 | Metro Private Car | 1925-26 |
| Milligan | W. J. | 44 Woodville Street, North Perth | Ford | 7261 | Metro Private Car | 1926-27 |
| Milligan | W. J. | 27 Woodville Street, North Perth | Ford | 7261 | Metro Private Car | 1927-28 |
| Milligan | Wm. | 1076 Hay Street, Perth | Indian & Sidecar | 120 | Metro Motorcycle | 1922-23 |
| Millikan | S. | 1070 Hay Street, West Perth | Gray | 13721 | Metro Private Car | 1926-27 |
| Millikan | S. | 1070 Hay Street, West Perth | Gray | 13721 | Metro Private Car | 1927-28 |
| Millin | L. | 53 Kitchener Avenue, Victoria Park | Morris-Cowley | 13582 | Metro Private Car | 1926-27 |
| Millin | L. | 53 Kitchener Avenue, Victoria Park | Morris-Cowley | 13582 | Metro Private Car | 1927-28 |
| Milling | G. | Bunbury | Overland 18 H.P. | By 9 | Bunbury Municipality | 1916 |
| Millington | G. | Donnybrook | Essex | PE ● 14 | Preston Road Board | 1927-28 |
| Millington | G. A. | Irvine Street, Cottesloe Beach | Dodge | 7126 | Metro Private Car | 1925-26 |
| Millington | H. | 509 Fitzgerald Street, Perth | Chevrolet | 4875 | Metro Private Car | 1924-25 |
| Millington | H. | 509 Fitzgerald Street, North Perth | Dodge | 8426 | Metro Private Car | 1925-26 |
| Millington | H. | Gairdner Street | Studebaker | N 175 | Northam Municipality | 1926-27 |
| Millington | H. | 509 Fitzgerald Street, North Perth | Dodge | 8426 | Metro Private Car | 1926-27 |
| Millington | H. | Gairdner Street | Studebaker | N 175 | Northam Municipality | 1927-28 |
| Millington | Harold | Fitzgerald Street, North Perth | Chrysler | 1583 | Metro Private Car | 1927-28 |
| Millington | J. | Katanning | Morris-Truck | KA ● 275 | Katanning Road Board | 1926-27 |
| Millington | J. | Katanning | Morris-Truck | KA ● 275 | Katanning Road Board | 1927-28 |
| Millington | Mervyn | 433 Wellington Street | Douglas 2¾ H.P. Motorcycle | P 495 | Perth Municipality | 1916 |
| Millington | S. | Meckering | Rugby | ME ● 116 | Meckering Road Board | 1927-28 |
| Millman | J. | 469 William Street, Perth | Willys-Knight | 10269 | Metro Hire or Trade | 1926-27 |
| Millman | J. | 179 Brisbane Street, Perth | Dodge | 823 | Metro Private Car | 1926-27 |
| Millman | J. | 179 Brisbane Street, Perth | Dodge | 823 | Metro Private Car | 1927-28 |
| Millman | Mrs H. | 469 William Street, Perth | Nash | 145 | Metro Private Car | 1927-28 |
| Millman | S. | C/o Stewart & Abbott | Brockway Truck | N 164 | Northam Municipality | 1925-26 |
| Millmott | W. | Dumbleyung | Buick | DU ● 62 | Dumbleyung Road Board | 1925-26 |