| Pearson | T. W. | Murton, Brunswick Junction | EB5 and 80D, 103E | 1962 |
| Pearson | W. T. | Glenberris, Kojonup | T4P | 1912 |
| Pearson | W. T. | Glenberris, Kojonup | T4P | 1924 |
| Pearson Bros. | (A. E. & G. A.) | Nelson Loc 4367, Nannup | PR7 | 1962 |
| Pearson Bros. | - | Leadale, Kojonup | LP3 and 12C, 15A | 1962 |
| Peart | E. P. R. | Hawkescroft, Mt. Barker | XP2 | 1924 |
| Pease | H. | Becla Mia, Bullsbrook | PH9 | 1962 |
| Pech | C. E. H. | Boyagin Valley, Brookton | C2P and 13B, 35E | 1962 |
| Pech | E. R. & O. | Glen Iris, Brookton | WP5 and 38B, 9A | 1962 |
| Pech | K. E. | 3654-5 Plantagenet, Brookton | KP7 and 13C, 25E | 1962 |
| Peck | E. E. | The Pines, Mount Barker | E2P | 1912 |
| Peddle | G. H. | Orlando, Pintharuka | G4R | 1924 |
| Pederick | H. A. | Carralyn, Wagin | 1PK and 33C, 103E | 1962 |
| Pederick | Hy. Jas. | Brooklyn, Wagin | H1P | 1912 |
| Pederick | Hy. Jas. | Brooklyn, Wagin | H1P | 1924 |
| Pederick | M. W. & M. J. | Woolgarre, Wagin | PK1 and 9D, 6E | 1962 |
| Pederick | S. A. | Brooklyn, Wagin | H1P and 21B, 15E | 1962 |
| Pederick | W. J. | Woolgarre, Wagin | PK1 | 1912 |
| Pederick | W. J. | Woolgarre, Wagin | PK1 | 1924 |
| Pederick | W. J. & F. L. | Sans-Souci, Kojonup | E0P and 102B, 102E | 1962 |
| Pederick | Wm. Thos. | The Mallets, Wagin | TP0 | 1912 |
| Pederick | Wm. Thos. | The Mallets, Wagin | TP0 | 1924 |
| Pederick & Co. | V. F. | Carralyn West, West Wagin | 1VP and 19C, 21E | 1962 |
| Pedersen | Carl | Manaring, Narrogin | PH7 | 1912 |
| Pedersen | Carl | Manaring, Narrogin | PH7 | 1924 |
| Pedretti | John | (Prospector), Wiluna | P3D | 1924 |
| Pedretti | Jos. | Geelorup Farm, Bunbury | 3PD | 1924 |
| Pedretti | Kate | Commonage, South Bunbury | K2P | 1924 |
| Pedretti | M. | Waterloo | 6PD | 1924 |
| Pedroli | G. | Grass Valley, Corrigin | PP3 and 30B, 24A | 1962 |
| Pedroli Paie & Prondie | - | Blocks 11418/74, 2679/55, 11420/74, 11719/74, Kunjinn | PP3 | 1912 |
| Pedroli, Paie & Prondie | - | Blocks 11418/74, 2679/55, 11420/74, 11419/74, Kunjin | PP3 | 1924 |
| Pedroline | August | Dardanup | 2PN | 1924 |
| Pedrolini | J. | Loc. Leschenault 26, Bunbury | 5PN | 1962 |
| Peek | A. O. | Nallan Run, Cue | A0P | 1912 |
| Peek | A. O. | Nallan Run, Cue | A0P | 1924 |
| Peek | B. W. | Yardue A. A. No. 92, Esperance | BP3 | 1912 |
| Peek | B. W. | Yardue A. A. No. 92, Esperance | EP3 | 1924 |
| Peek | C. W. L. | Lakeside Farm, Bullock Hills via Katanning | C5P | 1912 |
| Peek | C. W. L. | Lakeside Farm, Bullock Hills, via Katanning | C5P | 1924 |
| Peek | E. E. | The Pines, Mt. Barker | E2P | 1924 |
| Peek | Geo. Jas. | Bullock Hills, Katanning | 1GJ | 1912 |
| Peek | Geo. Jas. | Bullock Hills, via Katanning | 1GJ | 1924 |
| Peek | H. | Wahroonga, Bullock Hills via Katanning | P9H | 1912 |
| Peek | H. | Wahroonga, Bullock Hills | P9H | 1924 |
| Peek | Laurie Edgar E. | Locs. 6756 and 6757, Dumbleyung | P8K | 1924 |
| Peel | M. | Albany, Albany | MP4 | 1912 |
| Peel | M. | Albany | MP4 | 1924 |
| Peel | M. | Eaglesfield, Nangeenan | W7P and 7E, 16D | 1962 |
| Peel and Watton | E. F. & H. | Hall's Creek | 9PX | 1924 |
