| Sprigg | W. L. | Mawido, Baandee | 5WS | 1912 |
| Sprigg | W. L. | Dandyking, Pingelly | 5WS | 1924 |
| Spriggs | H. L. & P. E. | Canowindra, Gnowangerup | H6P and 43B, 120A | 1962 |
| Spring | Arthur | Springish Farm, Greenfields | Q9S | 1924 |
| Spring Vale Pastoral Co. | - | Spring Vale Station, Halls Creek | B7C and 80C, 25E | 1962 |
| Springan | John | Dangemanning, Doodlakine | 4VY | 1924 |
| Springan | T. | Turkey Point, Bunbury | TS4 | 1912 |
| Springbett | H. P. & M. | Tutomoney Park, York | 1SB and 13C, 38E | 1962 |
| Springbett Bros. | - | Tutomoney Park, York | 1SB | 1928 |
| Springdale Pastoral Co. | - | Springdale, Narrikup | SD7 and 51F, 44B | 1962 |
| Springhall | J. F. | Bando, Thompson's Brook via Donnybrook | E9G | 1927 |
| Springhill Guernsey Stud | - | Sussex 750, Chapmans Hill, Via Busselton | SH1 | 1962 |
| Springman | Englebert | Moondyke Creek, Cartmeticup | E3S | 1912 |
| Springman | Mrs G. | Boyanup | E3S | 1924 |
| Sproge | Richard | Chanybrearup, Jarnadup | S6X | 1924 |
| Sproston | Arthur | Wellington Location 1416, Buckingham's Siding | 8ZA | 1924 |
| Sproule | C. C. | Ratio Downs, Gibson Soak | CS2 and 120D, 39E | 1962 |
| Sproule | F. | Spica Station, Southern Cross | F4S | 1912 |
| Sproule | F. | Tyrone, Wagin, East | F4S | 1924 |
| Sproxton | E. | 8485, 9764, Nyabing | SE8 and 107B, 110A | 1962 |
| Sprunt | G. Junior | Spica Street, Southern Cross | 0GP | 1924 |
| Sprunt | G., jun. | Smithdale and Wedgecarrup, Wagin | 0GP | 1912 |
| Spry | H. B. | Kojonup Loc. 3333, 4823, 3322, 4316, 5625, 5631, 5522, 5625, 3413, 3613, Katanning | HS6 and 16C, 38E | 1962 |
| Spry | I. R. & E. G. | 2808-9-10, Mount Barker | ZZ3 and 107B, 31E | 1962 |
| Spry | L. G. H. | Glenrae M1320, Lower Chittering, Via Bullsbrook East | L9S and 22C, 80A | 1962 |
| Spry | N. E. | Tyrone, Wagin East | NEI | 1912 |
| Spry Hol & McMillan | - | Mandora Station, Wallal | NE1 | 1924 |
| Spudy | H. A. | Yetna | 9SY | 1924 |
| Spurge | H. E. | Kybi, Regans Ford, Regans Ford | 3ES and 26B, 112E | 1962 |
| Spurge | H. E. | Acklands, Moora | H9S and 41D, 26E | 1962 |
| Spurge | J. W. | Lancewood, Harvey | Q4L | 1924 |
| Spurge | John William | Lancewood, Harvey | Q4L | 1925 |
| Spurgeon | J. W. | Telferscat, Kulin | S9N and 3C, 80E | 1962 |
| Spurling | John | La Grange | 9YJ | 1924 |
| Spurr | C. A. | Wellington 189, Capel | 4CP and 44C, 116A | 1962 |
| Spurr | E. F. & L. | Avon 18696-7-8, Karlgarin | EF5 and 58F, 49D | 1962 |
| Spurr | J. B. | Avon Loc. 18689, Kondinin | J6S and 47B, 107E | 1962 |
| Spurr | K. M. & C. M. | Smith Dale, Wagin | MS1 and 9B, 8E | 1962 |
| Spurr | Mathew | Smithdale and Wedgecarrup, Wagin | MS1 | 1912 |
| Spurr | Mathew | Smithdale and at Wedgecarrup, Wagin | MS1 | 1924 |
| Spurr | P. J. E. | Texas Flat, Kondinin | 2SP and 11B, 67E | 1962 |
| Spurr | Peter | Springfield, Wagin | PS2 | 1912 |
| Spurr | Peter | Springfield, Wagin | PS2 | 1924 |
| Spurr | Peter | Comadyne Farm, Jitarning Siding | Z2U | 1924 |
| Squance | William F. | Speckville Block 1222, Wellington Loc., North Collie | SQ5 | 1926 |
| Squance & Sons | - | Rheola, Round Hill, Via Moora | SQ5 | 1924 |
| Squareini | P. | Yorlatine, Kojonup | 1PS and 15B, 53F | 1962 |
| Squibb | William A. | Beauleigh, Tenterden | 6XB | 1926 |
| Squibb Bros | - | Wongellilup, Tenterden East | 4LX | 1924 |
| Squiers | A. C. | 6339, 7354, 6103, East Pingelly | 5AC and 39B. 108E | 1962 |
