| Said | Mahomet | Coolgardie | SM1 | 1912 |
| Said | Mahomet | Coolgardie | SM1 | 1924 |
| Said | Mahomet Noor | Murrin Murrin | SN9 | 1912 |
| Said | Mahomet Noor | Murrin Murrin | SN9 | 1924 |
| Said | Nazar | Commonage, Wiluna | SN1 | 1912 |
| Said | Noor Mahomed | Leonora | SR3 | 1912 |
| Said | Noor Mahomed | Leonora | SR3 | 1924 |
| Said | Nozar Mahomed | (Camel Carrier), Mt. Magnet | 1SZ | 1912 |
| Said | Nozar Mahomed | (Camel Carrier), Mt. Magnet | 1SZ | 1924 |
| Said | Sedick | Abbotts | 1SK | 1912 |
| Said | Sedick | Abbotts | 1SK | 1924 |
| Saidup | - | (Carrier), Onslow | P8S | 1924 |
| Sainsbury | George | Batbatting, Newcastle | GS8 | 1912 |
| Sainsbury | George | Batbatting, via Toodyay | GS8 | 1924 |
| Sainsbury | H. | Batbatting, Goomalling | HS8 | 1912 |
| Sainsbury | H. | Batbatting, via Goomalling | HS8 | 1924 |
| Sainsbury | J. L. & C. W. | Lomos | 9LZ | 1924 |
| Sainsbury Bros. | - | Lavington Farms, Nungarin | 3SB and 9B, 84A | 1962 |
| Saint | E. | Braeside, Kelmscott | E3S and 31D, 36E | 1962 |
| Saint | Edward | Kendrick Farm, Bowgada | E3S | 1927 |
| Saint Joseph's Girls' Orphanage | - | Subiaco | OS8 | 1912 |
| Saint Joseph's Girls' Orphanage | - | Subiaco | OS8 | 1924 |
| Saint Joseph's Girls' Orphanage | - | Station Street, Wembley | OS8 | 1962 |
| Sainty | K. E. | 272, Menzies | K3S and 56F, 3D | 1962 |
| Sala | A. Dela | Crooked Brook, Dardanup | DS1 | 1912 |
| Sala | A. Dela | Crooked Brook, via Dardanup | DS1 | 1924 |
| Salaam | Kaka | Commonage, Wiluna | 0SK | 1912 |
| Salaam | Kaka | Wiluna | 0SK | 1924 |
| Salathiel | E. E. | Fairfield, Yealering | S4Q | 1924 |
| Salathiel | H. T. B. | Block 19445, Yealering Lake, Wickepin | H7B | 1912 |
| Salathiel | H. T. B. | Block 19445, Lake Yealering | H7B | 1924 |
| Salau | A. F. | Kunnine, West Pingelly | A0S and 15D, 9E | 1962 |
| Sale | B. R. | 753, 1805, 749, 172 Nelson Locs., Balingup | 3LL and 17D, 42E | 1962 |
| Saleeba | Aex. | Saleeba's Run, Moora | 4AS | 1924 |
| Saleeba | Alex | Saleeba's Run, Moora | 4AS | 1912 |
| Saleeba | K. | Loc. No. 8, Moora | K8S | 1924 |
| Saleeba | W. | M.1894 and Pt. M.2073, Mogumber | WS0 and 49D, 115E | 1962 |
| Salerian & Son | J. | Marri Farm, Waroona | S7J and 103D, 67E | 1962 |
| Sales | H. J. & M. | 77, 241, 242, 80, Kellerberrin | SH7 and 16B, 67A | 1962 |
| Sales | V. R. | Hillsbrook, Beela, via Brunswick Junction | V0S and 31B, 104E | 1962 |
| Salhar | Abdul | Hawke's Nest, Laverton | 4SZ | 1924 |
| Saligari | C. J. & G. | Carberdine Pool, West Wagin | V0M and 8B, 6E | 1962 |
| Saligari | R. | Mosgill Farm, Pickering Brook | S8L | 1912 |
| Saligari | R. | Mosgill Farm, Pickering Brook | S8L | 1924 |
| Saligari & Ruggeri | - | Tam Benni, Waddington | SR1 and 24B, 31E | 1962 |
| Sallie | Moosa | Wyndham | 8ZM | 1924 |
| Salmon | A. M. C. | Warralee, Margaret River | W5V | 1962 |
| Salmon | L. A. | Locs. 3765, 8518, Manjimup | 9YS | 1962 |
| Salmon | P. D. C. | Langton Park, Cowaramup | PD0 and 25B, 103A | 1962 |
| Salmon & Co. | M. A. | Sunnydale, Bindi Bindi | M4S and 15B, 43A | 1962 |
