| Prior | R. W. | Lynwood, Picton Junction | XP7 | 1962 |
| Prior | T. H. | Ridgevale, Yealering | 7TP and 27B, 41A | 1962 |
| Prior & Johnson | F. & W. | Mt. Hart Station, West Kimberley | P5J | 1924 |
| Prior & Son | C. W. | Ucarno and Burnside, Moora | U6D and 55F, 46C | 1962 |
| Prior & Weaber | - | Ningbing Station, Northam and Denmark | K7K | 1912 |
| Prior & Weaber | - | Ningbing Station, Northam and Denmark | K7K | 1924 |
| Pritchard | Annie | Maida P. O. | ZP9 | 1924 |
| Pritchard | B. A. | Chidlows Well | B1P | 1912 |
| Pritchard | B. A. | Chidlow's Well | B1P | 1924 |
| Pritchard | Ed. | Ueralia, Kwollyinn | E0P | 1912 |
| Pritchard | Ed. | Ueralia, Kwolynn | E0P | 1924 |
| Pritchard | F. J. | Bushy Park, Marradong | 2FP | 1924 |
| Pritchard | F. J. & I. | 6860/55, 11319/74, Onslow | 2FP | 1912 |
| Pritchard | G. E. | Wadjari, Bencubbin | P0G and 11B, 41A | 1962 |
| Pritchard | G. P. | Illoura, Ptn. Kojonup Loc. 4481, Durranillin | E3G and 45B, 33A | 1962 |
| Pritchard | Geo. B | Jigalong, Nullagine | PG6 | 1924 |
| Pritchard | James | The Avenue, Midland Junction | DP0 | 1924 |
| Pritchard | John | Maroonah, Kojonup | P0D | 1912 |
| Pritchard | John | Maroonah, Kojonup | P0D | 1924 |
| Pritchard | R. A. | Julia Range, Narrogin | J7P and 11C, 49A | 1962 |
| Pritchard | W. N. | 14250, 14271, Bencubbin | PD6 and 46D, 52F | 1962 |
| Pritchett | E. J. | The Nook, Moora | 8PK | 1924 |
| Privett | E. | Loc. 9060 Grp. 10 Glenoran, Manjimup | 3YD | 1962 |
| Probert | E. | Aberavon, Welbungin | P4T and 11C, 108E | 1962 |
| Probert | N. E. | Stirling, Rockingham | NP7 | 1912 |
| Probert | N. E. | Stirling, Rockingham | NP7 | 1924 |
| Probert | V. O. | 14385, 14400, Welbungin | PB0 and 42C, 36E | 1962 |
| Prockton | A. J. | Chesterfield, Boyup Brook | C9P | 1924 |
| Procktor | A. J. | Chesterfield, Boyup Brook | C9P | 1912 |
| Procopio | O. B. & V. | Nelson 7995, Cudinup, via Nannup | A5S and 58F, 19D | 1962 |
| Procter | A. | Wellington 5, 39, Brunswick Junction | 6JP and 117B, 103A | 1962 |
| Procter | J. B. | Grovelea (Avon 20312, 639, 20671), Koorda | 1IW and 14D, 102E | 1962 |
| Proctor | C. C. | Le Soren, Karridale | 7PC | 1962 |
| Proctor | Clarence | Sunnyside, Denmark | 6VP | 1924 |
| Proctor | E. A. | Glenroy Park, Bunbury | L5J | 1912 |
| Proctor | E. A. | Glenroy Park, Bunbury | L5J | 1924 |
| Proctor | Edmund C. | The Advance, Newlands | P9T | 1924 |
| Proctor | G. M. | Dunnichen, Circle Valley, via Norseman | M2P and 45C, 43E | 1962 |
| Proctor | P. | The Advance, Donnybrook | P9T and 15B, 18E | 1962 |
| Proctor | Wm. | Clarence, Denmark | PP9 | 1924 |
| Proctor & Son | O. & E. J. | Plantagenet Locs. 3622, 5089, Denmark | 4PK and 111B, 8E | 1962 |
| Properjohn | C. E. | Commonage, Katanning | CP3 | 1912 |
| Properjohn | C. E. | Commonage, Katanning | CP3 | 1924 |
| Proser | A. J. | Mayfield, Gin Gin | 2PJ | 1924 |
| Prosser | Alex | The Bone Yard and Happy Valley, Bunbury | AP3 | 1912 |
| Prosser | Alex | The Bone Yard and Happy Valley, Bunbury | AP3 | 1924 |
| Prosser | Allen C. | Prospect Hill, Woodanilling | 8AP | 1924 |
| Prosser | B. N. | Kaybrian, Kukerin | B9P and 67B, 24A | 1962 |
| Prosser | C. A. | Lorraine, Marracoonda, via, Katanning | 4CP and 50B, 21E | 1962 |
| Prosser | H. J. & L. V. | Montrose, Wickepin | I9P and 4B, 49A | 1962 |
