| Sykes | R. | Lakeside 15082, Kondinin | R4S and 50D, 46E | 1962 |
| Sykes | Robert | Oakbank, Donnybrook | SY1 | 1912 |
| Sykes & Perry | - | Pinjiewarrie, Pithara | SY1 | 1924 |
| Syliffe | P. H. B. | Mt. Phillip, Carnarvon | ZO1 | 1912 |
| Syliffe | P. H. B. | Mt. Phillip, Carnarvon | ZO1 | 1924 |
| Sylvania Pastoral Co. | - | Sylvania Station, Pastoral leases 394/1330, 394/994, Meekatharra | C0B and 5D, 32E | 1962 |
| Syme | D. C. | 5592, 5560, 5277, 5591, Buntine | DS2 and 30B, 48A | 1962 |
| Syme | G. R. A. & A. A. | Kuranga, 1495 and 1498, Esperance | A3S and 29B, 112E | 1962 |
| Syme | Geo. | Symeington, Barton | G5S | 1912 |
| Syme | Geo. | Semeington, Barton | G5S | 1924 |
| Syme | J. | Hillside Farm, Wubin | XZ2 and 39B, 55F | 1962 |
| Syme | J. M. & W. E. | Lynnwood and Loc. 220, Helena Valley and Buntine | 9JS and 7C, 80A | 1962 |
| Syme | J. T. | Golden Valley, Brookton | 8JS | 1912 |
| Syme | J. T. | Golden Valley, Via Norseman | 8JS | 1924 |
| Syme | J. V. & D. J. | Lantana, Wubin | VS0 and 16B, 41A | 1962 |
| Syme | John | Location 5410, Wubin | XZ2 | 1924 |
| Syme | R. | Anyadha, Buntine | 2RS and 47B, 28E | 1962 |
| Syme | R. & M. M. | Glen Alloa, Robertsville, Wubin | R9S and 36D, 39E | 1962 |
| Syme | Robt. | Circle valley, Via Norseman | 6QR | 1924 |
| Symes | A. H. | Sleeper's Patch, Brookton | SA9 | 1912 |
| Symes | A. H. | Sleepers Patch, Brookton | SA9 | 1924 |
| Symes | F. S. | Canning Loc. 1106, Mt. Pleasant | FS9 | 1962 |
| Symes | J. C. | Jandakot | QS7 | 1924 |
| Symes | J. T. | Loc. 6024, Brookton | 8JS and 12B, 13E | 1962 |
| Symes | Leonard S. | Golden Grove, Brookton | SY5 | 1924 |
| Symes | P. M. | 2097 Norman Grange, Cowaramup | 5SY | 1962 |
| Symes & Sons | A. A. | Red Acres, Muntadgin | QS7 and 23B, 48E | 1962 |
| Symington | A. I. (Mrs) | Boolgana, Coolup AA. Lots 47 and 81, Coolup | A1F and 40B, 119E | 1962 |
| Symington | Douglas W. | Summer Lee, Kunnunoppin | DW5 | 1924 |
| Symington | V. D. & F. G. | Narratarra Lot 2, East Chapman | X3F and 11D, 5E | 1962 |
| Symon | O. S. | Waranga Farmk Pingelly | 7BP | 1927 |
| Symonds | J. S. | Berkshire Valley | QX3 | 1924 |
| Symonds | J. S. | Benalla Park, Berkshire Valley, Via Moora | Y7U | 1924 |
| Symonds Bros. | - | Darkan | 2XV | 1924 |
| Symons | H. | 3406 Wellington Loc. Duranillin | SZ6 and 33C, 6A | 1962 |
| Symons | J. N. & V. O. | Raesbrook, Kendenup | S0R and 53F, 20B | 1962 |
| Synnot | Fred A. | Wandering, York | Z4S | 1924 |
| Synnot | M. F. | 12373-4, Boyup Brook | SX1 and 11B, 5A | 1962 |
| Synnott | Inglis | Ingelup, Broom Hill | SB4 | 1912 |
| Synott | Inglis | Ingelup, Broome Hill | SB4 | 1924 |
| Syred | E. R. | Narla Avon Locs. 23042 and 27729, Bolgart | ES7 and 67B, 39A | 1962 |
| Syred | George | Bejoording, Newcastle | SZ1 | 1912 |
| Syred | George | Bejoording, Toodyay | SZ1 | 1924 |
| Syred | H. I. | Barooga, South Stirling | H3S and 13C, 30E | 1962 |
| Syred | M. H. & G. M. | Stony Brook, Wattening | 7SU and 13B, 8E | 1962 |
| Syred | Miss L. B. | Stoney Brook, Wattening | Z4U | 1924 |
| Syred | P. | Bedjoording, Bolgart | SZ1 and 1C, 109E | 1962 |
| Syred | R. P. | S.25, Toodyay | D1Z | 1962 |
| Syred | S. H. | Stoney Brook, Bejoording | D1Z | 1912 |
| Syred | S. H. | Stoney Brook, Bejoording | D1Z | 1924 |
