| Strauss | T. A. | Nelson Loc. 2133, 932, Wilgarup, via Bridgetown | 6TA | 1962 |
| Straw | Andrew | Wungallup, 5 acres, Block No. 11, Clifton Street, Collie | AQ6 | 1925 |
| Straw & Whiteaker | J. & R. L. | Blue Valley, Beela | 2SW | 1962 |
| Strawbridge | A. | Allandale Farm, Wonnerup | 8SA | 1924 |
| Strawbridge | A. R. | Roe 1496, 1162, Lake Varley | 8SA and 12D, 44E | 1962 |
| Streatfield | E. S. | Loc. 3629, Margaret River | S5Z | 1962 |
| Streatfield | W & A | Yalup Brook | S8F | 1924 |
| Street | Chas. H & sons | Mindora, Marble Bay | H6S | 1924 |
| Street | Chas. H., & Son | Mindora, Marble Bar | H6S | 1912 |
| Street | H. R. & A. M. | Rock End, Canna | 9HA and 119B, 115E | 1962 |
| Street | W. J. | Ballidu | NX3 | 1924 |
| Streeter & co | - | Roebuck Plains Station, Broome | O0O | 1924 |
| Streeter & co | - | Alpha Parking, Broome | S1S | 1924 |
| Streeter & Male Pty. Ltd. | - | Hill Station, Broome | OP3 and 11C, 4A | 1962 |
| Strempel | H. | Kunjinn Farm, Kunjinn | S2K | 1912 |
| Strempel | H. | Kunjin Farm, Kunjin | S2K | 1924 |
| Strempel | Mrs T. A. | Block No. 80, Greenmount | S7E | 1924 |
| Strempel | Mrs. T. A. | Block No. 80, Greenmount | S7E | 1912 |
| Stretch | A. F. & M. G. | Nelson Loc. 7349, Boyup Brook | 4FA and 15B, 44A | 1962 |
| Stretch | H. Wm. | Norris Hill, Bridgetown | 9XS | 1924 |
| Stretch | W. G. | Rocklynn, Bridgetown | C1C and 10C, 9E | 1962 |
| Stretch & Co. | W. H. C. | Wandoora, Kojonup | R8K and 13B, 118A | 1962 |
| Stretton & Collins | - | Commonage, Marble Bar | J7G | 1912 |
| Strickland | D. M. | Gowrie Farm, Gowrie | XS2 | 1924 |
| Strickland | E. | Elsington, Wongan Hills | 7ES | 1912 |
| Strickland | E. | Elsington, Wongan Hills | 73S | 1924 |
| Strickland | J. & D. | Gowrie, Dalwallinu | JD7 | 1924 |
| Strickland | R. J. | 5019, Dardadine | RS6 and 23D, 71E | 1962 |
| Strickland | R. L. & T. F. | Quiliping, Dardadine | 5RS and 10C, 30E | 1962 |
| Strickland | W. H. J. | Lockville, Wonnerup | SX5 | 1924 |
| Strickland | W. J. | Rock Dale Farm, Wongan Hills | ZJ6 | 1924 |
| Strickland & Co. | - | Gowrie, Pithara | XS2 and 7B, 35E | 1962 |
| Strickland & Sons | F. W. L. | Blaenavon & Myola, Dangin | SL6 102B, 10A | 1962 |
| Stringwell | Wm. L. | Avon Locs. 14123 & 14127, Nunarin | QS4 | 1924 |
| Stronach | D. W. | 314-5-9-20, Woodanilling | SN8 and 50B, 106E | 1962 |
| Stronach | Donald John | Avon Locs. 713, 6477, 19602, Tammin | D4Z | 1924 |
| Strong | A. P. | Sussex Loc. 1631, Forest Grove | AS3 and 41B, 4A | 1962 |
| Strong | H. H. H. A. & A. P. | Sussex Locs. 1631, 1646, 3718, Forest Grove | SG1 and 44B, 109E | 1962 |
| Strong | H. W. & K. A. | Daydawn, Witchcliffe | IK7 | 1962 |
| Strong | W. T. | Capel Sub. Lots 36-38, 43, Town Lots 58-65, 66-71, Capel | WT6 and 40B, 35E | 1962 |
| Strong & Sons | J. R. | Blackwattle Farm, Tutunup | 7JS | 1962 |
| Stroschin | E. | Maylands Farm, Wagin | E6S | 1912 |
| Stroschin | E. | Maylands Farm, Wagin | E6S | 1924 |
| Strother | R. G. | Roe Loc. 1150, Holt Rock, via Newdegate | SR0 and 40D, 120E | 1962 |
| Stroud | C. | Treforia Farm, Busselton | CY7 and 71C, 107A | 1962 |
| Stroud | E. H. | Crown Lands, South Greenbushes | ES5 | 1912 |
| Stroud | E. H. | Crown Lands, S. Greenbushes | ES5 | 1924 |
| Stroud | K. & Y. | 2095, Cowaramup | S5F | 1962 |
| Stroud | M. G. | Greenfields, Busselton | MS9 and 17B, 39A | 1962 |
| Strudwick | A. H. | Commonage, Collie | SZ7 | 1924 |
