| Schinzig | W. H. | Terikiki 161-2-3-4-5, Darkan | WS8 and 32C, 9E | 1962 |
| Schipp | J. J. | Graball Estate, Graball | O5Z | 1924 |
| Schipp | L. G. | Wodgie Park Farm, Narembeen | Q2Z | 1924 |
| Schlam | C. C. & I. S. | Hillside Farm, Koorda | KU8 and 27D, 116E | 1962 |
| Schlam | W. | Harvey, A.A. Lots 325, 329, Yarloop | ST4 and 105B, 50A | 1962 |
| Schlam Tippett & Son | - | 46/984, Yarloop | ST4 | 1912 |
| Schlam, Tippett, & Son | - | 46/984, Yarloop | ST4 | 1924 |
| Schleicher | A. V. | Oakbank, Dudinin | VS2 and 24B, 84A | 1962 |
| Schleicher | H. E. | Streatham Farm, Wagin West | ZE6 | 1924 |
| Schlmeter & Co. | - | Gurleen, Tambellup | S4X and 40D, 34E | 1962 |
| Schloithe | F. A. H. & E. S. | Greenslopes, Crossman, via Williams | 4FA and 24D, 110E | 1962 |
| Schmaal | George Frederick | Edithvale, Cranbrook | G0S | 1926 |
| Schmetzer | H. | Lot 14, Byford; Commonage, Cue | SV8 | 1924 |
| Schmidt | C. O. | Counnudine, 3380, 4835, Cuballing | C0S and 23D, 47E | 1962 |
| Schmidt | E. G. | Marbling, Lower Chittering | E5S and 58F, 7C | 1962 |
| Schmidt | E. H. | Morning Glory, Redcliffe | Z0S | 1962 |
| Schmidt | Fred. M. | Carrolup, via Katanning | 7NS | 1924 |
| Schmidt | G. D. | Yvandia, Lowden | 3UM and 44D, 102E | 1962 |
| Schmidt | H. | Roe Street, Perth | Z0S | 1924 |
| Schmidt | J. G. K. | Locs. 213-7, Narembeen | 8KS and 42B, 4E | 1962 |
| Schmidt | R. J. & M. I. | Hemmington, Narrogin | CG4 and 40B, 14A | 1962 |
| Schmidt | S. M. | Lakeside, Goomalling | SS6 | 1912 |
| Schmidt | S. M. | Lakeside, Goomalling | SS6 | 1924 |
| Schmitt | D. C. & A. E. | Melbourne Loc. 3605, Ballaring, Dandaragan | V2S and 34D, 36E | 1962 |
| Schmitt | W. J. | Yalalie Park, Melbourne Loc. 3606, Moora | Y4P and 37C, 103E | 1962 |
| Schnaars | Geo. | Wyanilling, Lomos | ZE8 | 1924 |
| Schoch | F. M. C. | Braeside, Cookernup | FS8 | 1912 |
| Schoch | F. M. C. | Braeside, Cookernup | FS8 | 1924 |
| Schock | L. D. A. | Cookernup Townsite Lots 60-7, Cookernup | FS8 | 1962 |
| Schocker Bros. | - | Albert Farm, Kalgoorlie | VZ0 | 1924 |
| Schofield | G. | Waverley, Wiliams | 5GS | 1912 |
| Schofield | G. | Waverley, Williams | 5GS | 1924 |
| Schofield | H. | Maugh Farm, Kalamunda | 7SK | 1912 |
| Schofield | H. | Maugh Farm, Kalamunda | 7SK | 1924 |
| Scholes | S. W. & P. M. | Yelverton Downs, Kojonup | 5YD | 1962 |
| Scholey | J. R. | Bay View Farm, Norseman | 6SY | 1912 |
| Scholey | J. R. | Bay View Farm, Norseman | 6SY | 1924 |
| Scholz | F. W. | Western Dale, Koojan | C5S and 48B, 21E | 1962 |
| Scholz | L. & R. J. | Brooklyn, Gingin | 6LR and 17B, 51F | 1962 |
| Scholz | W. G. | Annesley Park, Rocky Gully | WS1 and 5B, 21A | 1962 |
| Schoppe | N. G. | Hazelwood, Avon Loc. 25472, Mukinbudin | NS7 and 10B, 21A | 1962 |
| Schorer | A. M. | Glen O'Tenner, Kulikup and Kojonup | S5R and 10B, 28E | 1962 |
| Schorer | D. N. | Williams 3178, 1988-9, 9132, 1991, West Highbury | 3DS and 44B, 111E | 1962 |
| Schorer | J. | Avondale Farm, West Pingelly | JS1 and 13C, 34E | 1962 |
| Schorer | J. F. | Rosedale, Cuballing | 2JX | 1924 |
| Schorer | J. T. & J. | Mummergully, Pingelly | JS1 | 1912 |
| Schorer | Joseph | Avondale Farm, Pingelly | JS1 | 1924 |
| Schorer | K. A. | Avon 7267, 17291, 13873, West Pingelly | KS9 and 55F, 115D | 1962 |
| Schorer | R. | Congella, Kulikup | 0XS and 13C, 53F | 1962 |
| Schram | Cyrus | Three-cornered Farm, Meckering | S0C | 1924 |
