| Penraat | Jan | Williams Locs. 12302 and 12489; Lake Grace | J7P | 1926 |
| Pens | T. M. | Victoria 10257, Encabba, Via Three Springs | T5P and 26B, 20A | 1962 |
| Pense | George | Wattle Grove Farm, Wickepin | G3P | 1924 |
| Pensini | A. | Nelson 8750, 8528, 8207, Pemberton | 7AP | 1962 |
| Pensini & Son | L. | Valencia and Studleigh, Mundijong and Mogumber | L6P and 8D, 27E | 1962 |
| Penton | Herbert | Hollow Gate Farm, Boddalin | Q3P | 1925 |
| Penton & Co. | - | Hollow Gate, Boddalin | Q3P and 57F, 39B | 1962 |
| Penttila | John F. | Waikelongup Farm, Tambellup, East | J2Q | 1924 |
| Pepall | | Edenia, Katanning | 5UP and 6C, 103E | 1962 |
| Pepall | Jas. Harry | Katanning | 5UP | 1924 |
| Pepper | A. S. M. R. R. S. Y. | Qualen Downs Est. Aldersyde | 3PE and 39B, 115A | 1962 |
| Percival | J. | Loc. 9082 ( Nelson), Pemberton | 3PJ | 1962 |
| Percy | J. B. | Tibradden Station, Geraldton | 2PD | 1912 |
| Percy | J. B. | Tibradden Station, Geraldton | 2PD | 1924 |
| Percy | R. G. | 2659, 2649, Part Victoria Loc. 1809, 2659, Waggrakine | 2IW and 33B, 44A | 1962 |
| Percy | Reg. G. J. | Garden Gully Station, Meekatharra | V2G | 1924 |
| Percy and Tubb | S. & C. | Glenluce, Kellerberrin | P2O | 1924 |
| Perejuan | Alfred J. | Allenooka Swamp, Walkaway | VP0 | 1912 |
| Perejuan | Alfred J. | Allenooka Swamp, Walkaway | VP0 | 1924 |
| Perejuan | Amelia | Allanook, Walkaway | AP4 | 1912 |
| Perejuan | Amelia | Allenooka, Walkaeay | AP4 | 1924 |
| Perejuan | T. W. & J. P. | Mt. Erin, Northern Gully | L2L | 1912 |
| Perejuan | T. W. & J. P. | Mt. Erin, Northern Gully | L3L | 1924 |
| Perfect | Mary | Wandibirrup, Beaufort Rd., via Woodanilling | Z7P | 1924 |
| Perfect | W. H. | Wandibirrup, Wagin | W3P | 1912 |
| Perfect | W. H. | Wandibirrup, Wagin | W3P | 1924 |
| Pergande | E. | Wyaenbbing, Mt. Marshall, via Kununoppin | P5E | 1924 |
| Peric & Son | M. | Swan 93-4, Caversham | 5TS and 39C, 26E | 1962 |
| Perich | Anton | Blocks 13187/55, 21149/55, 26275, Kellerberrin | P7A | 1912 |
| Perich | Anton | Blocks 13187/55, 21149/55, 26475/55, Kellerberrin | P7A | 1924 |
| Perich | R. A. | Oakrist, Menkadine, Kellerberrin | PQ8 | 1924 |
| Pericich | T. | Locs. 5942, 6198, Tardun | T9P and 43B, 53F | 1962 |
| Pericles | G. | Noora Cunbee, Bruce Rock | 0PG and 38B, 6A | 1962 |
| Perilya Pastral Co. | - | Perilya, Southern Cross | 7PP and 29D, 3E | 1962 |
| Perisich | J. | Wooligan, Tardun | I0E and 49D, 35E | 1962 |
| Perkin Bros. | - | Daneke Farm, Kojonup | P4B | 1912 |
| Perkin Bros. | - | Daneke Farm, Kojonup | P4B | 1924 |
| Perkins | A. S. | Sefton Park, Williams | H9O | 1925 |
| Perkins | C. C. | Avon 16955-6, Belka | 2CP and 9B, 59F | 1962 |
| Perkins | Charles T. | Loc. 1641, No. 7 Group, Nuralingup | 2OQ | 1925 |
| Perkins | D. & M. | Cambelqueen 1299, 730, 729, 688, 683-7, 190, Tenterden | D6M and 115B, 104A | 1962 |
| Perkins | I. A. | Lake View, Nunigup, via Tenterden | P5N | 1924 |
| Perkins | Margaret S. | Boyanup | T0T | 1912 |
| Perkins | Margaret S. | Boyanup | T0T | 1924 |
| Perkins | R. A. | Sefton Park, Williams | H9O and 27D, 28E | 1962 |
| Perkins & Sons | - | Queen of the Valley, Mortegallup | PS8 | 1924 |
| Perkins & Sons | - | Queen Valley, Tenterden | PS8 and 38B, 41E | 1962 |
| Perkins Bros. | - | Danetree, Kojonup 4538, Kojonup | P4B and 21B, 5E | 1962 |
| Perks | A. | Loc. Wellington 1 Lots 5 and 33, Wokalup | PK7 | 1962 |
| Perks | D. M. | Rose Meath, Nannup | V1P | 1962 |
