| Pratt | Josiah | Commonage, Gosnells | 4JP | 1912 |
| Pratt | Josiah | Commonage, Gosnells | 4JP | 1924 |
| Pratt | L. H. | Windridge, Kudardup | 7LP and 15D, 108E | 1962 |
| Pratt | L. M. J. | Group 96, Northcliffe | 6CN | 1962 |
| Pratt | M. E. | Hill Farm, Kudardup | PP1 | 1962 |
| Pratt | P. H. & E. O. | Girraween, Hay River, via Denmark | P5P and 84B, 102A | 1962 |
| Pratt | Percy William | Hill Farm, Kudardup | PP1 | 1928 |
| Pratt | S. M. | St. Clair, Kojonup | 1SP and 27B, 35A | 1962 |
| Pratt | Sophy | Commonage, Carnarvon | S0P | 1912 |
| Pratt | Sophy | Commonage, Carnarvon | S0P | 1924 |
| Pratt | W. H. | Ayton Downs, Esperance | W6P and 6B, 120E | 1962 |
| Pratt | Wm. | Ninghan Loc. 446, Koorda | VP5 | 1924 |
| Prebble | H. C. & M. J. | Oldfield 638 and 640, Hopetoun | H2P and 30B, 16A | 1962 |
| Preece | A. G. | Blue Stream, Forrestfield | PG8 | 1962 |
| Preece | A. J. | Myarra Orchard, Keysbrook | 6PR | 1962 |
| Preece | Albert G. | Ferndale, Broomehill | 7PV | 1924 |
| Preece | P. G. | Carnarvon | GP1 | 1912 |
| Preece | P. G. | Carnarvon | GP1 | 1924 |
| Preece | Richard | Coolup Lot 220, Pinjarra | 6PY | 1924 |
| Prendergast | J. M. | 16-25, Mullewa | J4P and 14B, 34E | 1962 |
| Prendergast | J. N. | Bonnie View, Bootenal | P7H and 3D, 28E | 1962 |
| Prendergast | Jos. Halby | Bonnie View, Georgina | P7H | 1924 |
| Prendergast & Brown | - | Locs. 14197 & 14208, Nungarin | TQ1 | 1924 |
| Prendiville | Thos. | Homestead Lease, Kurramia | 6PT | 1924 |
| Prentice | Sarah A. | Quondong Downs, Broome | QR6 | 1912 |
| Presbyterian Children's Homes | - | Benmore, Burnbrae, Caversham and Byford | 6PC | 1962 |
| Presbyterian Mission | - | Mowanjum Mission, Derby | PM3 and 23B, 5A | 1962 |
| Prescott | F. | Toro Brook, Wyening, via Toodyay | FP8 | 1924 |
| Presentation Convent | - | Commonage, Carnarvon | P8C | 1912 |
| Press | T. J. | Block 61, Kwollyinn, Kellerberrin | 8TP | 1912 |
| Press | T. J. | Block 61, Kwolyin, Kellerberrin | 8TP | 1924 |
| Preston | A. J. | Sunnyside, Tarwongup, via Williams | P7Y and 107D, 15E | 1962 |
| Preston | D. H. | Victoria Locs. 1830, 1890, 1806 and Mt. Erin Estate, Geraldton | D6R and 11C, 39A | 1962 |
| Preston | D. H. & R. H. | Amuri Park, via Geraldton | D6R | 1926 |
| Preston | J. C. | Hay Loc. 408, Cranbrook | JP2 and 6D, 140E | 1962 |
| Preston | Jos. Robt. | Leases 4227/55, 4224/74, 4726/55, Tarwongup, via Williams | P7Y | 1924 |
| Preston | R. H. | The Vale, Bridgetown | X0C and 5D, 115E | 1962 |
| Preston & Co. Pty. Ltd. | - | Avonsyde, Perth | PV0 and 16C, 80E | 1962 |
| Preston Bros. & Thumhill | - | Doodenanning, Greenhills | PT9 | 1924 |
| Preston Bros. & Van Raalte | - | Oak Fields, Barberton | 2PV | 1924 |
| Preston Estates Pty. Ltd. | - | Preston Park, Lowden | P9P and 36B, 111A | 1962 |
| Preston Road Board | - | Preston Road District, Donnybrook | PR4 | 1962 |
| Preston Roads Board | - | Public Pound, Donnybrook | PR4 | 1912 |
| Preston Roads Board | - | Public Pound, Donnybrook | PR4 | 1924 |
| Prewett | Henry | Honey Wood Farm, Brookton East | 6PH | 1912 |
| Prewett | Henry | Honeywood Farm, Brookton, East | 6PH | 1924 |
| Price | A. A. | Mathoura, Bodallin | PA6 and 43C, 3E | 1962 |
| Price | A. C. | Sunnyside, Kelmscott | AV8 and 32D, 119E | 1962 |
| Price | A. E. H. | Yilgarn 472-3-4, Bodallin | 6AP and 11B, 104A | 1962 |
| Price | A. L. & J. D. | 19, 20 and 27, Bowelling | A2P and 41B, 3E | 1962 |
