| Poole | Hy. Jas. | Greenough | PZ1 | 1924 |
| Poole | J. | Water Hole Farm, South Greenough | 8JP | 1912 |
| Poole | J. jun. | Water Hole Farm, South Greenough | 8JP | 1924 |
| Poole | John A. | Sturt, Narrogin | JP9 | 1912 |
| Poole | John A. | Sturt, Narrogin | JP9 | 1924 |
| Poole | Jos. | cr. Frobisher Road and Roberts Street, Osborne Park | OZ8 | 1924 |
| Poole | Richard M. | Yilgarn Loc. 243, Burracoppin | 8QP | 1925 |
| Poole | Sophia | Hamilton Hill. South Fremantle | OP5 | 1924 |
| Poole Bros. | - | Hector Street, Osborne Park | PB4 | 1926 |
| Pooley | W. R. V. | Hay Loc. 2110, Mt. Barker | W9P and 52F, 9D | 1962 |
| Poolman | J. J. K. | Wiltshire Farm, Denmark | XP3 | 1962 |
| Poolman | R. C. | 448, Denmark | G8F and 49C, 103A | 1962 |
| Pope | Albert Leslie | Jilbadji Loc. Burracoppin | X8N | 1924 |
| Pope | C. N. | Wanderin, Cranbrook | 5CP and 108D, 110E | 1962 |
| Pope | E. | Redfield Farm, Jibberding | EP4 and 42C, 44E | 1962 |
| Pope | E. L. | Homebush, Cranbrook | P6B and 51F, 33D | 1962 |
| Pope | Edward | Castlewood, Kununoppin | U5P | 1924 |
| Pope | Harold & Charles | Victoria Locs. 1935 and 2023, Carnamah | Q4P | 1926 |
| Pope | John | Macedon Park, Popanyinning | PU0 | 1924 |
| Pope | Mrs S. H. | Jam Valley Farm, Bungulla | 4PA | 1924 |
| Pope | N. F. & M. E. | Hillview, Kulin | 7EL and 56F, 17C | 1962 |
| Pope | Wallington P. | Coombend, Cranbrook | 4PP | 1924 |
| Pope & Mullally | - | Belvedere, Cunderdin | 4PM | 1912 |
| Pope & Mullally | - | Belvedere, Cunderdin | 4PM | 1924 |
| Pope Bros. | - | Koolabba, Victoria Loc. 1473, Carnamah | Q4P and 19B, 34E | 1962 |
| Popkins | Wm. | Hall's Creek, Wyndham | 0KT | 1924 |
| Popperwell | G. | Caern Celyn, Dunsborough | GP0 and 8B, 106E | 1962 |
| Popplewell | J. W. & A. H. | Attunga, Dandaragan | 8PK and 1C, 116E | 1962 |
| Popplewell Bros. | - | Goonderabbic, Windiridge, Wyuna, Brahgabby, Walebing | 8JP and 28D, 57F | 1962 |
| Porch | E. | A.285A, Denmark | P8E | 1962 |
| Port | A. E. | Cascades Estates, Hester | N5X | 1924 |
| Port | J. C. | Tuffreigh, Argyle Siding | 6CP | 1912 |
| Port | J. C. | Tuffreigh, Argyle Siding | 6CP | 1924 |
| Portelli | G. | Blackwood River, Balingup | 1GP | 1912 |
| Portelli | G. | Blackwood River, Balingup | 1GP | 1924 |
| Porteous | E. M. | Nairibin, Dumbleyung | PE0 and 20C, 23A | 1962 |
| Porteous | E. M. (Mrs) | Culbina, Dumbleyung | 7EP and 107B, 120E | 1962 |
| Porteous | Ellen | Broomehill | PE7 | 1912 |
| Porteous | F. A. | Culbina, Dumbleyung | PE7 and 4D, 35E | 1962 |
| Porteous | H. Mc.K. | Glen Haven, Gnowangerup and East Broomehill | 8MP | 1912 |
| Porteous | H. McK. | Glen Haven, Gnowangerup, East Broomehill | 8MP | 1924 |
| Porteous | Herbert E. | Morthill Farm, Gnowangerup | P8H | 1924 |
| Porteous | J. W. | 5974, Mt. Barker | 0JP and 120D, 11E | 1962 |
| Porteous | Robt. | Glen Hampton, Gnowangerup | 3BE | 1912 |
| Porteous | Robt. | Glen Hampton, Gnowangerup | 3BE | 1924 |
| Porteous | Roy Albert | Craigg Lee, Gnowangerup | P9N | 1924 |
| Porteous | Roy Edgar | Dumbleyung | PE7 | 1924 |
| Porter | Arthur | Loc. 1, Cockburn Sound Loc. 10, Hamilton Hill | YF8 | 1924 |
| Porter | F. A. | Garfield, Northampton | F4P and 59F, 116B | 1962 |
| Porter | G. H. | Locs. 2996, 2995, Lashbrook Moora | G4P and 30D, 111E | 1962 |
