| Parker & Son | - | Fitzgerald Street | Dodge | N 18 | Northam Municipality | 1924-25 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 73 | Northam Municipality | 1924-25 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 85 | Northam Municipality | 1924-25 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 1 | Northam Municipality | 1925-26 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 18 | Northam Municipality | 1925-26 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 27 | Northam Municipality | 1925-26 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 85 | Northam Municipality | 1925-26 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 1 | Northam Municipality | 1926-27 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 18 | Northam Municipality | 1926-27 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 27 | Northam Municipality | 1926-27 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 1 | Northam Municipality | 1927-28 |
| Parker & Son | - | Fitzgerald Street | Dodge | N 18 | Northam Municipality | 1927-28 |
| Parker & Son | S. F. A. | Fitzgerald Street | Dodge | N 1 | Northam Municipality | 1924-25 |
| Parker & Spargo | - | Merredin | Chevrolet | MD ● 128 | Merredin Road Board | 1927-28 |
| Parker & Spargo | - | Kellerberrin | Dealers | KE ● 330 | Kellerberrin Road Board | 1927-28 |
| Parker Bros | - | Waroona | Chevrolet Truck | DK ● 30 | Drakesbrook Road Board | 1926-27 |
| Parker Bros | - | Waroona | Chevrolet Truck | DK ● 30 | Drakesbrook Road Board | 1927-28 |
| Parker Bros. | - | Carnamah | Ford Truck | CA ● 245 | Carnamah Road Board | 1927-28 |
| Parker Jones Group. | T. | 39 Peel Estate | Essex | RO ● 16 | Rockingham Road Board | 1926-27 |
| Parkes | F. H. | Kalamunda | J.A.P. | DR ● 4 | Darling Range Road Board | 1919 |
| Parkins | W. | 8 Parker Street, Perth | Ford | 6383 | Metro Private Car | 1924-25 |
| Parnell | F. G. | Tinkurrin | Ford | WK ● 137 | Wickepin Road Board | 1926-27 |
| Parnell | F. G. | Tinkurrin | Ford | WK ● 137 | Wickepin Road Board | 1927-28 |
| Parry | Frank | 103 Kensington Street, East Perth | Overland | 540 | Metro Private Car | 1923-24 |
| Parry | Frank | 103 Kensington Street, East Perth | Overland | 540 | Metro Private Car | 1924-25 |
| Parry | Frank | 103 Kensington Street, East Perth | Overland | 540 | Metro Private Car | 1925-26 |
| Parson | C. L. | Mungetup | Studebaker | PL ● 115 | Plantagenet Road Board | 1926-27 |
| Parsons | - | Newdegate | Anderson | LG ● 66 | Lake Grace Road Board | 1925-26 |
| Parsons | - | Newdegate | Anderson | LG ● 66 | Lake Grace Road Board | 1926-27 |
| Parsons | A. V. G. | Mount Barker | Chevrolet | PL ● 126 | Plantagenet Road Board | 1927-28 |
| Parsons | C. | Cranbrook | Studebaker | CB ● 55 | Cranbrook Road Board | 1927-28 |
| Parsons | C. C. | Kerrelocking | Ford | WM ● 128 | Wyalkatchem Road Board | 1925-26 |
| Parsons | C. L. | Mungetup | Studebaker | PL ● 115 | Plantagenet Road Board | 1925-26 |
| Parsons | Claude L. | Mungitup, Cranbrook | Studebaker | PL ● 115 | Plantagenet Road Board | 1924-25 |
| Pasaoe | J. | - | Studebaker | CU ● 93 | Upper Chapman Road Board | 1926-27 |
| Pascoe | J. | - | Studebaker | CU ● 93 | Upper Chapman Road Board | 1925-26 |
| Pascoe | J. | Cunderdin | Ford | ME ● 82 | Meckering Road Board | 1925-26 |
| Pascoe | J. | Cunderdin | Ford | ME ● 82 | Meckering Road Board | 1926-27 |
| Pascoe | J. | - | Studebaker | CU ● 93 | Upper Chapman Road Board | 1927-28 |
| Pascoe | J. | Cunderdin | Ford | ME ● 64 | Meckering Road Board | 1927-28 |
| Pascoe | J. | Cunderdin | Ford | ME ● 82 | Meckering Road Board | 1927-28 |
| Pascoe | Joseph | Cunderdin | Ford | ME ● 13 | Meckering Road Board | 1923-24 |
| Pascoe | Joseph | Cunderdin | Ford | ME ● 13 | Meckering Road Board | 1924-25 |
| Pascoe | Joseph | Cunderdin | Buick | ME ● 13 | Meckering Road Board | 1925-26 |
| Pascoe | Joseph | Cunderdin | Buick | ME ● 13 | Meckering Road Board | 1926-27 |
| Pascoe | Joseph | Cunderdin | Buick | ME ● 13 | Meckering Road Board | 1927-28 |
| Pascoe | W. J. | Boulder | Studebaker 20 H.P. | B 4 | Boulder Municipality | 1916 |
| Pascoe | W. J. | Boulder | Studebaker 20 H.P. | B 4 | Boulder Municipality | 1917-18 |
| Pascoe | W. J. | 50 Claney Street, Boulder | Studebaker for Trade or Hire | B 4 | Boulder Municipality | 1922-23 |
| Pascoe | W. J. | 50 Clancy Street, Boulder | Studebaker | B 4 | Boulder Municipality | 1923-24 |
