| Pilatti | E. J. | Wellington Loc. 3046, 2819, Buckingham | ZJ8 and 44D, 47E | 1962 |
| Pilatti | J. | Wellington Locs. 2173, 2886, 3635, 2335, Buckingham, Via Collie | 8PJ and 42C, 54F | 1962 |
| Pilchowski | R. A. | Rosalyn, Wongan | 7RP | 1912 |
| Pilchowski | R. A. | Springvale, Wyndham | 7RP | 1924 |
| Pilgrim | Arthur | Yilgarn Loc. 734, Noongarr | KX8 | 1925 |
| Pilkington | J. D. | 2 Gwenyfred Road, South Pert | D3P and 22C, 46A | 1962 |
| Pilkington | John D. | Chitibin, via Northam | D3P | 1924 |
| Pilkington | John jun. | Springvale, Wyndham | 2JP | 1912 |
| Pilkington | John junr. | Dandabin, Northam | 2JP | 1924 |
| Pilkington | Michael | Avon Loc. 13082, Chitibin, via Northam | 2KP | 1924 |
| Pilmer | Richard G. | Craigieburn, Burekup | 7XP | 1924 |
| Piloni | E. E. | Dandabin, Northam | BP2 | 1912 |
| Piloni | E. E. | Haresfield, Wannamal | BP2 | 1924 |
| Pimlott | F. M. & D. C. | Attunga, Kwolyin | G0V and 49B, 29E | 1962 |
| Pimlott | J. H. & F. M. | Cronton, Kwolyin | J1F and 16B, 50E | 1962 |
| Pinchbeck | J. | Wallal Downs Station | 2PP | 1912 |
| Pinchbeck | J. | Raven, York | 2PP | 1924 |
| Pindabunna Pastoral Co. Ltd. | - | Copperdine Station Paynes Find | Y7G | 1927 |
| Pindabunna Pastoral Co. Ltd. | - | Pindabunna Station, Paynes Find | Y7G and 11C, 5E | 1962 |
| Pindar Avondale Pastoral Co. | - | Avondale, Pindar | ZL7 and 8B, 107A | 1962 |
| Pinfold | M. W. | Glenbrook, Kalgrain, Kondinin | PU3 | 1924 |
| Pini | P. | Roe Loc. 732, 205, Narembeen | P1P and 46B, 115A | 1962 |
| Pinim | J. E. & M. E. | Sussex Loc. 1902-3, Rosa Brook, Via Margaret River | MJ9 and 17C, 117A | 1962 |
| Pinjarra Race Club (Inc.) | - | 12-15, 20-25, Pinjarra | L7B and 49B, 11E | 1962 |
| Pink | E. S. | Haresfield, Wannamal | E3P | 1912 |
| Pink | E. S. | Karroyoal, Baandee | E3P | 1924 |
| Pink | M. J. E. | Woodlands Farm, Nungarin | 6MP and 7D, 71E | 1962 |
| Pink | W. L. | 11085-7, Nungarin | 4PL and 50B, 45E | 1962 |
| Pink & Co. | W. L. | 113-5, 167, Nukarni | ID3 and 48B, 31E | 1962 |
| Pinker | Jas. | Avon Loc. 14545, Yarding, via Bruce Rock | 9UP | 1924 |
| Pinkerton | Thos. | Mt. Marshall | 5PN | 1924 |
| Pinnacles Pastoral Co. | - | Pinnacles Station, Leonora | XR1 and 12C, 12A | 1962 |
| Pinnacles Proprietary, Ltd. | - | Pinnacles Station, Lawlers | XR1 | 1926 |
| Pinner | R. A. | Wellington 1 Lot 40, Benger | 1PR and 115B, 32A | 1962 |
| Pinner | T. | Raven, York | TP2 | 1912 |
| Pinner | T. | Harvey Estate, Harvey | TP2 | 1924 |
| Pinney | G. | Molobup Springs, Gnowangerup | QZ7 and 19D, 103E | 1962 |
| Pinney | George | Plantagenet Loc. 3015, Toompup | QZ7 | 1925 |
| Pinniger | W. H. | Kentucky, Hallowell park, Denmark | 1PN and 103D, 35E | 1962 |
| Pinnock | D. B. | Bolero, Metricup | 9PD | 1962 |
| Pinnock | Francis Jno. | Leonard Street, Victoria Park | PN0 | 1924 |
| Pinnuck | Geo. | Jaloginda Common, Meekatharra | 0UP | 1924 |
| Pipe | A. E. | 2587, 1541, Pithara | A5E and 13D, 120E | 1962 |
| Pipe | E. | Gavaus Clump, Pithara | AP4 and 13C, 47E | 1962 |
| Pipe | J. W. | Block 1794, Pithara | 9EP and 13B, 120E | 1962 |
| Pipe & Galbraith | - | Karroyoal, Baandee | PG1 | 1912 |
| Pipe & Galbraith | - | Wallal Downs Station, Wallal | PG1 | 1924 |
| Piper | D. | Woolandoon, Bindi Bindi | 1DP and 26B, 119A | 1962 |
| Piper | F. (jnr) | Rutherglen 2956, Kulikup | 1FP and 49B, 4E | 1962 |
| Piper | I. & N. | Gaybourn, Bindi Bindi | RP7 and 44B, 104A | 1962 |
