| O'Connor | Thos. | (Prospector), Turkey Creek P. O. | TO3 | 1924 |
| O'Connor | W. | Innisfree, Busselton | XX8 and 106B, 38E | 1962 |
| O'Connor | W. H. A. | Loc. 9486, Wickepin | 7OC | 1924 |
| O'Connor | Wm. | Blocks C.P. 4545 & 4541, Yuba via Northampton | CY7 | 1912 |
| O'Connor | Wm. | Blocks C. P. 4545 and 4541, Yuba, via Northampton | CY7 | 1924 |
| O'Connor Bros. | - | Silverdale Pastoral Co. West Wagin | 0SP and 13A, 24B | 1962 |
| O'Dea | E. G. | Glenelg, 15628, Hines Hill | J0D and 11B, 44E | 1962 |
| O'Dea | E. J. | Loc. 1103, Calingiri | O5J and 3D, 19E | 1962 |
| O'Dea | Edward | Loc. 1828, Calingiri | OE4 | 1924 |
| O'Dea | F. V. | Navon, Dulbelling | F0D | 1912 |
| O'Dea | F. V. | Navon, Dulbelling | F0D | 1924 |
| O'Dea | G. C. & P. C. | Ninghan 345-6, 525, Pithara | OO1 and 47A, 9B | 1962 |
| O'Dea | J. B. | Creekside, Dangin | 6OD | 1924 |
| O'Dea | J. F, & M. M. | The Rockies, Bowgada | JF7 and 37D, 116E | 1962 |
| O'Dea | J. F. | Glenelg, Nangeenan | J0D | 1924 |
| O'Dea | J. M. | 142-3, Nalkain | T8W and 12B, 107E | 1962 |
| O'Dea | J. S. | Kent Loc. 1283, Ongerup | J1O and 102B, 7A | 1962 |
| O'Dea | Jno. | Roslevan, East Wagin | J9D | 1912 |
| O'Dea | Jno. | Roselvan, East Wagin | J9D | 1924 |
| O'Dea | John | Wyaning, Pell Mell, Toodyay | 05J | 1912 |
| O'Dea | John | Wyening, Pell Mell, Toodyay | O5J | 1924 |
| O'Dea | Jos. Jas. | Loc. 4736, Perenjori | 4OJ | 1924 |
| O'Dea | Kyran M. | Kamurangha, Ravensthorpe | OD9 | 1924 |
| O'Dea | M. | Wangermine, Toodyay | D7A | 1924 |
| O'Dea | M. J. & J. J. | Dalesford, Bowgada | 4OJ and 55F, 30B | 1962 |
| O'Dea | Patk. | Washpool, Newcastle | PO5 | 1912 |
| O'Dea | Patrick | Washpool, Toodyay | PO5 | 1924 |
| O'Dea | R. P. | Washpool Farm, Calingiri | 8PD | 1962 |
| O'Dea | R. P. & E. O. | Washpool, Calingiri | RE2 and 45C, 115E | 1962 |
| O'Dea | Richard Patrick | Washpool Farm, Calingri | 8PD | 1924 |
| O'Dea | T. | Hill View, Wyening, Toodyay | TO7 | 1912 |
| O'Dea | T. | Hill View, Wyening, via Toodyay | TO7 | 1924 |
| O'Dea | T. A. | Block 10, Nangeenan | 3OD | 1912 |
| O'Dea | T. A. | Block 10, Nangeenan | 3OD | 1924 |
| O'Dea | T. C. & H. J. | Tajden, Ballidu | 4TC and 18B, 23A | 1962 |
| O'Dea | Thos. | Brown's Corner, Moojebing | OD5 | 1912 |
| O'Dea | Thos. 9846 | Brown's Corner, Moojebing | OD5 | 1924 |
| O'Dea & Townsend | J. C. & L. A. | Ninghan, Dalwallinu | KO1 | 1924 |
| O'Dea & Townsend | J. C. & L. A. | Kilfenora, Pithara | KO1 and 15B, 30E | 1962 |
| O'Dea & Virgo | - | Peepingee, Nomans Lake | OV7 and 9E, 37D | 1962 |
| O'Donaghue | John | Bamboo Springs, Nullagine | C6V | 1912 |
| O'Donahoo | S. A. Y. | Shamrock Flat, Clackline | O4D | 1912 |
| O'Donnell | D. P. | Loc. 18668, Kondinin | O3P | 1924 |
| O'Donnell | E. | 1229, Nabawa | E2D and 31B, 36A | 1962 |
| O'Donnell | J. | M. H. 1678/102, Leonora | DS6 | 1912 |
| O'Donnell | J. | M. H. 1678/102, Leonora | DS6 | 1924 |
| O'Donnell | Jas. | Commonage, Sandstone | 0D3 | 1912 |
| O'Donnell | Jas. | Murchison, Boolardy, via Yalgoo | 2OD | 1924 |
| O'Donnell | Jas. | Commonage, Sandstone | OD3 | 1924 |
| O'Donnell | Jas. sen. | Annie Brook, Quindalup | OD1 | 1912 |
