| Sandow | J. B. & M. J. | Mannadale, Gingin | S3D and 50D, 119E | 1962 |
| Sands | G. | Hazeldene, Newdegate | YG0 | 1924 |
| Sands | G. W. | Roslyn Dairy, Queen's Park | 5YS | 1924 |
| Sands | J. | Billy Goat Farm, via Cottesloe Beach | VZ6 | 1924 |
| Sands | R. | Eden Park, Barton | SR9 | 1912 |
| Sands | R. | Eden Park, Barton | SR9 | 1924 |
| Sands | R. J. H. | Hillside Farm, Barton | S7R | 1912 |
| Sands | R. J. H. | Hillside Farm, Barton | S7R | 1924 |
| Sands | R. W. | St. Helmo, 8th Street, Harvey | 0SR | 1912 |
| Sands | R. W. | St. Helmo, 8th Street, Harvey | 0SR | 1924 |
| Sands, Investments Pty. Ltd. | D. | Djarnup, Gidgegannup | DS6 and 80B, 26A | 1962 |
| Sandwell | A. J. | Orana, Katanning | 0JS and 41B, 113E | 1962 |
| Sandy | W. J. | Pindar Siding, Murchison | 4XD | 1924 |
| Sandy | W. J. | Zante, Newburn | 4XD | 1962 |
| Sanford | H. A. | Northampton | QS5 | 1924 |
| Sanford | H. F. S. & D. E. | Mayo Orchard, Donnybrook | 2SU and 117B, 116A | 1962 |
| Sanford | Janet | Mayo, Donnybrook | 2SU | 1924 |
| Sankey | G. W. | 4744, 5225-6 Plantagenet, Mt. Barker | GS7 and 39C, 84A | 1962 |
| Sankey & Leach | - | Lichfield, Mt. Barker | V7C and 11D, 112E | 1962 |
| Sansom | B. | Bramhope Farm, Bussleton | Q4A | 1924 |
| Sansom | Frank | Greyswood, Yelbeni | F1S | 1928 |
| Sansom | Thomas G. | Bramhope Farm, Busselton | 0KS | 1927 |
| Santa Maria Downs Pastoral Co. | - | Santa Maria, West Swan | SM8 and 45B, 111E | 1962 |
| Sarell | W. F. | Elsfield, Pinjarra | 7FS | 1912 |
| Sarell | W. F. | Elsfield, Pinjarra | 7FS | 1924 |
| Sargant | W. & B. | Glen Mignon, Dorakin, East Narrogin | BS8 | 1912 |
| Sargant | W. & B. | Glen Mignon, Dorakin | BS9 | 1924 |
| Sargeant | A. A. & M. E. | Williams Locs. 4299, 10889, 9964, 14311, 15124, 4906, Highbury | 9AS and 28C, 120A | 1962 |
| Sargent | A. Mc. | 990-1, 1824, 1827, 1826, 1828, Katanning | A4S and 36B, 26A | 1962 |
| Sargent | Arthur McD. | Homestead Farm, 5080-74, Katanning | A4S | 1912 |
| Sargent | Arthur McD. | H. F. 5080/74, Katanning | A4S | 1924 |
| Sargent | J. A. & G. A. | Clover Downs, Talbot Brook, York | S5J and 8B, 45A | 1962 |
| Sargent | P. G. | Urella Downs Kojonup | XS4 and 34D, 27E | 1962 |
| Sargent | P. H. | Riverville, York | PS4 | 1912 |
| Sargent | P. H. | Riverville, York | PS4 | 1924 |
| Sargent | Wm. A. T. | South Peringillup | T8S | 1924 |
| Sargeut | P. H. | Fairview, York | PS4 and 27D, 20E | 1962 |
| Sarich | M. | Leonard Rd., Lots. 825-7, Herne Hill | M0S and 8D, 40E | 1962 |
| Sarteur | Joseph | Commonage, Dongarra | 2JS | 1912 |
| Sarteur | Joseph | Dongarra | 2JS | 1924 |
| Sartori | A. | Williams 3682, 3671, 3674, 2799, 2835, 5275, 5189,, Wickepin | 8AF and 102B, 7E | 1962 |
| Sartori | L. G. | 1458, 9393, 9389, Manjimup | 1LS and 55F, 28D | 1962 |
| Sartori & Holmes | - | Arnold Park, York | N3S | 1924 |
| Sasche | F. W. & J. G. | Hillside Farm, Kununoppin | U7S | 1924 |
| Sasse | D. J. | Wilmington Gardens Farm, Wubin | 0DZ | 1924 |
| Sasse | Eric | Redcliffe Farm, Morawa | S4A | 1924 |
| Sasse | R. H. & M. L. | Block 8428 and 8651, Canna | SR1 and 23B, 119A | 1962 |
| Sassella | L. M. | Sunny Downs, Slamon Gums | S6Z and 48B, 105A | 1962 |
| Sassella | P. J. | Locs. 515 and 131 Tumbalong, Salmon Gums | SA1 and 45B, 43A | 1962 |
| Sattell | James | Bendigo Farm, Boyup Brook | 6JS | 1912 |
