| Powell | R. N. | Yorkrakine | Ford Truck | KE ● 41 | Kellerberrin Road Board | 1927-28 |
| Powell | S. J. | Duke Street | B.S.A. Motorcycle | N 32 | Northam Municipality | 1922-23 |
| Pratt | A. | Gnowangerup | Studebaker | GN ● 121 | Gnowangerup Road Board | 1926-27 |
| Pratt | A. | Gnowangerup | Studebaker | GN ● 121 | Gnowangerup Road Board | 1927-28 |
| Pratt | C. | Busselton | Studebaker | BN 53 | Busselton Municipality | 1924-25 |
| Price | A. P. | North Cunderdin | Chevrolet Truck | ME ● 292 | Meckering Road Board | 1926-27 |
| Price | A. P. | North Cunderdin | Chevrolet Truck | ME ● 292 | Meckering Road Board | 1927-28 |
| Price | J. A. | Cunderdin | Chevrolet Truck | ME ● 128 | Meckering Road Board | 1926-27 |
| Price | J. A. | Cunderdin | Chevrolet Truck | ME ● 128 | Meckering Road Board | 1927-28 |
| Price | T. J. | Caretaker Point Walter | Ford Van | 5106 | Metro Private Car | 1927-28 |
| Price | Thos. | Karragullen | Oakland | A-K ● 79 | Armadale-Kelmscott Road Board | 1924-25 |
| Price | W. H. | Lake Grace | Chevrolet | LG ● 5 | Lake Grace Road Board | 1927-28 |
| Prideaux | - | Norman's Lake | Chevrolet Truck | NO ● 136 | Narrogin Road Board | 1927-28 |
| Pridmore | L. W. | Bedfordale | Chevrolet Truck | A-K ● 146 | Armadale-Kelmscott Road Board | 1927-28 |
| Prier | F. G. | 22 McMullan Street, Perth | Studebaker | 11171 | Metro Private Car | 1926-27 |
| Priest | J. | C/o Mrs Farrier, Duke Street | Ford | N 207 | Northam Municipality | 1926-27 |
| Prince | E. | Toolibin | Ford Truck | WK ● 157 | Wickepin Road Board | 1925-26 |
| Prince | E. | Toolibin | Ford Truck | WK ● 157 | Wickepin Road Board | 1926-27 |
| Prins | Dr. | Wickepin | Ford 20 H.P. | WK 10 | Wickepin Road Board | 1916 |
| Prior | F. G. | 22 McMillan Street, Victoria Park | Studebaker | 11171 | Metro Private Car | 1927-28 |
| Prior | G. | Baandee | Ford Truck | KE ● 17 | Kellerberrin Road Board | 1927-28 |
| Prior | J. | Bay View Terrace | Studebaker 25-30 H.P. | C 85 | Claremont Municipality | 1916 |
| Prior | J. | Victoria-parade Claremont | Studebaker H.P | 1503 | Metro Private Car | 1922-23 |
| Prior | James | 150 Victoria Avenue, Claremont | Studebaker | 1503 | Metro Private Car | 1923-24 |
| Prior | James | 150 Victoria Avenue, Claremont | Studebaker | 1503 | Metro Private Car | 1924-25 |
| Prior | Jas. | York Road | Studebaker 25 H.P. | MJ 1 | Midland Junction Municipality | 1916 |
| Prior | Jas. | York Road | Studebaker 25 H.P. | MJ 8 | Midland Junction Municipality | 1916 |
| Prior | Jas. | York Road | Studebaker 25 H.P. | MJ 5 | Midland Junction Municipality | 1917-18 |
| Prior | Jas. | York Road | Studebaker 25 H.P. | MJ 8 | Midland Junction Municipality | 1919 |
| Prior | Mrs F. M. | Gingin | Studebaker | GG ● 10 | Gingin Road Board | 1925-26 |
| Prior | Mrs F. M. | Gingin | Studebaker | GG ● 10 | Gingin Road Board | 1926-27 |
| Prior | P. J. S. | Yord Road, M. Junction | Studebaker 25 H.P. | P 932 | Perth Municipality | 1916 |
| Prior | W. | Kellerberrin | Gray | KE ● 25 | Kellerberrin Road Board | 1926-27 |
| Prior | W. | Kellerberrin | Gray | KE ● 25 | Kellerberrin Road Board | 1927-28 |
| Pritchard | - | 103 Lake Street | Renault 12 H.P. | P 260 | Perth Municipality | 1917-18 |
| Pritchard | Dr | Guildford | Studebaker | 1530 | Metro Private Car | 1922-23 |
| Pritchard | Dr. | Guildford | Studebaker | 1530 | Metro Private Car | 1923-24 |
| Pritchard | E. H. | 126 Lake Street, Perth | Dodge | 11836 | Metro Private Car | 1926-27 |
| Pritchard | F. J | Newdegate | Ford | LG ● 129 | Lake Grace Road Board | 1927-28 |
| Pritchard | F. J. | Newdegate | Ford | LG ● 101 | Lake Grace Road Board | 1927-28 |
| Pritchard | R. C. | 103 Lake Street | Renault 12 H.P. | P 260 | Perth Municipality | 1919 |
| Pritchard | W. H. | 126 Lake Street, Perth | Dodge | 11836 | Metro Private Car | 1927-28 |
| Proctor | Mrs E. H. | Pingrup | Whippet | KT ● 78 | Kent Road Board | 1927-28 |
| Producer's Markets | - | James Street, Perth | Dodge | 636 | Metro Private Car | 1922-23 |
| Producers Markets Ltd | - | James Street, Perth | Dodge | 636 | Metro Private Car | 1923-24 |
| Prosser | C. H. | 111 Moran Street, Boulder | Studebaker | B 1 | Boulder Municipality | 1926-27 |
| Prosser | C. R. | Boulder | Studebaker 15-20 H.P. | BMC 17 | Boulder Municipality | 1916 |
| Prosser | C. R. | Boulder | Studebaker 15-20 H.P. | BMC 1 | Boulder Municipality | 1917-18 |
| Prosser | C. R. | Boulder | Studebaker 20 H.P. | BMC 1 | Boulder Municipality | 1919 |
| Prosser | C. R. | 111 Moran Street, Boulder | Studebaker for Trade or Hire | B 1 | Boulder Municipality | 1922-23 |
