| Oldham | R. A. D. | Studbrook, Tenindewa | O2T | 1924 |
| Oldham | R. R. & M. S. | Bindaree, Wooroloo | R0R and 40D, 8E | 1962 |
| Oldham & Tullock | P. A. D. & N. W. | Studbrook | O2T | 1912 |
| Olds | B. E. & L. D. | She Oak, Pithara | BE0 and 102D, 25E | 1962 |
| Oliff | Leslie | - | U7X | 1912 |
| Oliff | Leslie | Wyndham | U7X | 1924 |
| Oliffe | F. L. H. | Burwood Farm, Kojonup | FL7 and 115D, 36E | 1962 |
| Olivari | B. | Block 2082-3, Ardoch, Ballidu | RZ0 and 14B, 111E | 1962 |
| Oliver | A. E. A. | Bathurst, Tarin Rock, via Kukerin | O6R and 21B, 26E | 1962 |
| Oliver | A. G. R. | Poverty Flat | 0AG | 1912 |
| Oliver | A. G. R. | Poverty Flat, Wickepin, E. Narrogin | 0AG | 1924 |
| Oliver | A. L. | Lockier Estate | 1CO | 1912 |
| Oliver | A. L. | Lockier Estate, Mingenew | 1CO | 1924 |
| Oliver | C. R. V. | Warriedar via Yalgoo | GV0 | 1926 |
| Oliver | David Darcy Walter | Ruby Plains, Hall's Creek | R3B | 1924 |
| Oliver | E. & F. | Clackline | YE0 | 1924 |
| Oliver | E. E. | 4789 Victoria Loc. Perenjori | EO1 and 27B, 16A | 1962 |
| Oliver | E. F. | Milmocundin, Walkaway | E7F and 46B, 45E | 1962 |
| Oliver | Edward Chas. | Yalgoo Goldfield, Yalgoo | E5O | 1924 |
| Oliver | Eliz. M. | Cr. Acton Avenue & Cleaver Terrace | Z0L | 1912 |
| Oliver | Eliz. M. | cr. Acton Avenue and Cleaver Terrace, Belmont Park | Z0L | 1924 |
| Oliver | F. | Loc. 10479, Northcliffe | Y3G | 1962 |
| Oliver | F. H. | Chiswick, Qualeup | F0V and 19D, 43E | 1962 |
| Oliver | F. P. & L. E. | Tara, Cordering, via Collie | FO2 and 43D, 45E | 1962 |
| Oliver | G. H. & R. M. | Hillside, Bakers Hill | 6MO and 102D, 40E | 1962 |
| Oliver | G. M. T. | Bebering, Meckaring | MO2 and 16D, 36E | 1962 |
| Oliver | Herbert. H. | Northam | 9OH | 1924 |
| Oliver | I. T. | Bebering, Meckaring | MO2 and 16D, 36E | 1962 |
| Oliver | Jane | Golden Grove via Yalgoo | O3J | 1912 |
| Oliver | Jane | Golden Grove, via Yalgoo | O3J | 1924 |
| Oliver | John | Commonage, Irwin | 8NO | 1924 |
| Oliver | L. B. | Wilsonia, Meckering | VW1 and 28D, 31E | 1962 |
| Oliver | L. V. | Woodlands, Murray 460, North Dandelup | L2O and 34C, 39A | 1962 |
| Oliver | M. jun. | Northam, Northam | MO2 | 1912 |
| Oliver | M. jun. | Northam | MO2 | 1924 |
| Oliver | Margaret | Victoria Loc. 6000, Three Springs | 6MO | 1924 |
| Oliver | Martha | White Dam, Jarraing | O6R | 1924 |
| Oliver | Phoebe H. | Lady Bountiful | PT0 | 1912 |
| Oliver | Phoebe H. | Lady Bountiful, Broad Arrow | PT0 | 1924 |
| Oliver | R. | Coodingnon, Payne's Find, Perenjori | 5OR | 1924 |
| Oliver | R. A. | Balgownie, Pemberton | 0AR and 117B, 120A | 1962 |
| Oliver | T. H. | Gainsborough, Wagin | TM0 | 1912 |
| Oliver | T. H. | Gainsborough, Wagin | TM0 | 1924 |
| Oliver | T. W. & S. | Field's Find, Yalgoo | TS2 | 1912 |
| Oliver | T. W. S. | Field's Find, Yalgoo | TS2 | 1924 |
| Oliver | Thos. | Cony Noox, Jarnadup | OT8 | 1924 |
| Oliver | Thos. Mead | Beering, Northam | ZN0 | 1924 |
| Oliver | Thos. Richard | The Alma Gold Mine, Field's Find via Yalgoo | T4O | 1924 |
| Oliver | Thos. W. | Commonage, Field's Find | T5O | 1912 |
| Oliver | Thos. W. | Commonage, Field's Find | T5O | 1924 |
