| Pitchers | Jno. Southwell | Harvey Estate, Harvey | PJ2 | 1912 |
| Pitchers | Jno. Southwell | Marjidin Estate, Williams | PJ2 | 1924 |
| Pitchford | Charles H. | Loc. 11108, Nungarin | H4P | 1927 |
| Pitchford | Geo. F. | White Peak Station, near Geraldton | CP4 | 1924 |
| Pitman | E. T. | Karangateen, Corrigin | AT1 and 13B, 34E | 1962 |
| Pitman | J. H. A. | Donnybrook Hotel, Donnybrook | 5PJ | 1912 |
| Pitman | J. H. A. | Hill View Farm, Yalup Brook, Waroona | 5PJ | 1924 |
| Pitman | Saml. T. | Fromefield, Kunjin | S6P | 1924 |
| Pitman | W. J. | 30, Albany | 2WP and 56F, 102B | 1962 |
| Pitman | W. M. | Lot 283, 449, 203, 79 and Pt. 1236, Waroona | 7XP and 38C, 80E | 1962 |
| Pitt | F. J. | Goomarin Vale, Via Merredin | FP7 | 1962 |
| Pitt | Frederick J. | Goomarin Vale, via Merredin | FP7 | 1927 |
| Pitt | Geo. Henry | Harvey Area Lot 143, Wagerup | PQ3 | 1924 |
| Pitt | Henry | Lot 609, Denmark | NP4 | 1924 |
| Pitt | L. R. P. | Lots 608-9, Denmark | NP4 and 43B, 108E | 1962 |
| Pitt | W. F. | Ivanhoe Farm, Merredin | P1T and 104D, 56F | 1962 |
| Pitt & Co. | F. A. | Fairlands, South Walgoolan | F1P and 14C, 67A | 1962 |
| Pittam | F. | Loc. 437, Mt. Shadforth, Denmark | F9P | 1962 |
| Pittam | R. & V. | Loc. 428-30-1, Mt Shadforth, Denmark | V6R | 1962 |
| Pittard | Albert W. D. | Werneth Farm, Box 69, Kulin | AP2 | 1927 |
| Pittard | J. D. | 14364, Kulin | 3JP and 13B, 103E | 1962 |
| Pittard | N. I. | Werneth Farm, Kulin | AP2 and 18B, 40E | 1962 |
| Pittaway | Wm. | Damboring | P8P | 1924 |
| Pittendreigh | Alex | Balgownie, Manjimup | PQ6 | 1924 |
| Pittendreigh Bros. | - | Balgownie, Manjimup | PQ6 and 3C, 12E | 1962 |
| Pittendrigh | Margaret | Donside, Manjimup | PD6 | 1924 |
| Pitter | W. | Edward Street, Osborne Park | 6PU | 1924 |
| Pittman | Geo. R. | Marjidin Estate, Williams | 2GP | 1912 |
| Pittman | Geo. R. | Donnybrook Hotel, Donnybrook | 2GP | 1924 |
| Pitts | D. J. | 343 Road Side, Busselton | M6P | 1962 |
| Pitts | David J. | Pennlands, Busselton | M6P | 1927 |
| Pitts | E. S. | Thurloo Farm, Yoongarillup, Via Busselton | 0JP | 1962 |
| Pitts | S. M. & E. J. | 1216, 1361, 370, Busselton | SM6 and 110B, 71E | 1962 |
| Pivac | I. | Nelson 618, Hester Siding | P1V | 1962 |
| Pizey Pty. Ltd. | J. C. | Wellington Locs. 1 48, Australind | JP5 and 107B, 116E | 1962 |
| Pizzino | V. | Locs. 1115,11181, 11199, Wanneroo and Nannup | V0P | 1962 |
| Place | E. & G | Yelki, Corrigin | WP2 and 15B, 4A | 1962 |
| Place | N. W. | Blantyne, Dowerin | 1NP and 19C, 27E | 1962 |
| Place | Wm. | Hill View Farm, Yalup Brook, Waroona | WP2 | 1912 |
| Place | Wm. | The Wimmera, Dowerin | WP2 | 1924 |
| Plackett | A. | Breascott, Eastbrook | 1YD | 1962 |
| Plaistowe | F. E. | Hughden, Ludlow Loc. 1991, Ludlow | F7P | 1924 |
| Plank | Jas. | The Wimmera, Dowerin | 6PK | 1912 |
| Plank | Jas. | Makotukn Farm, Kulyalling | 6PK | 1924 |
| Plank | P. S. & S. L. | Shireta Downs, Darkan | 1PP and 103B, 104A | 1962 |
| Plant | Alfred E. | East Narrogin | A7P | 1928 |
| Plant | C. A. J. | Lauder Downs, Dinninup | 7BN and 44B, 33E | 1962 |
| Plant | F. & E. | Avon 13425-7-8-9, 16936and 22569, Belka | P7E and 29B, 49E | 1962 |
| Plant | Jos. H. | Vict. Loc. 1258, Greenough | O7P | 1924 |
| Plant | Nellie | Makotukn Farm, Kulyoling | J5P | 1912 |
