| Simkin | R. H. & D. | Brimvale, Binnu | R7S and 37B, 118E | 1962 |
| Simkin | R. H. & D. | Brimvale, Binnu | R7S and 37B, 118E | 1962 |
| Simkin & Co | C. H. | 5914, 1781, 8275, 4483, Terara, Northhampton | GN7 and 105B, 22E | 1962 |
| Simkin & Co | C. H. | 5914, 1781, 8275, 4483, Terara, Northhampton | GN7 and 105B, 22E | 1962 |
| Simkin & Co | J. W.E. | Lyndale, Binnu | W5A and 102D, 33E | 1962 |
| Simmonds | E. W. J. | Urandy Creek, Onslow | ES2 and 36B, 42A | 1962 |
| Simmonds | E. W. J. | Urandy Creek, Onslow | ES2 and 36B, 42A | 1962 |
| Simmonds | J. | Block 281, Boyanup | 7NZ | 1924 |
| Simmonds | James | Glenrowan, Meckering | JS2 | 1912 |
| Simmonds | James | Glenrowan, Meckering | JS2 | 1924 |
| Simmonds | L. W. | Block 3, North Burracoppin | 0SL and 49B, 31A | 1962 |
| Simmonds | R. A. | Wellington 4477, Collie | 4SE and 105D, 8E | 1962 |
| Simmonds & Co | I. C. | 14494-5, 13931-3, 13917, 14747, 15892, 22337, 14529,26894, Ardath | 7CS and 44B, 110A | 1962 |
| Simmonds & Ryder | L. & T. | Warren, Pemberton | D7Q and 33C, 118A | 1962 |
| Simmons | Chas. E. | Duck Swamp, Roelands | W1B | 1924 |
| Simmons | E. & G. A. | Hanley Park, Narrogin | 4KX and 103B, 22A | 1962 |
| Simmons | E. B. | Westlands, Beverley | BS4 and 10C, 113E | 1962 |
| Simmons | G. P. | Panarama, Rocky Gully | 5SP and 40B, 11A | 1962 |
| Simmons | Herbert | Glen Huon, Dale, Beverley | I5S | 1926 |
| Simmons | Herbert T. | Bushley, Upper Blackwood | PT2 | 1924 |
| Simmons | J. R. | Cork Farm, Denmark | US4 | 1924 |
| Simmons | James R. | Lot 383, Denmark | 9NS | 1924 |
| Simmons | R. | Town Block 112, Cleaver Street, Carnarvon | YU1 | 1912 |
| Simmons | R. | Block 112, Cleaver Street, Carnarvon | YU1 | 1924 |
| Simmons | W. C. R. | Churchill, Goomalling | W6S | 1912 |
| Simmons | W. C. R. | Churchill, Goomalling | W6S | 1924 |
| Simmons | William | Yilgarn Loc. 735, Noongar | WS1 | 1926 |
| Simms | A. | Eighth Road, 117-9 Part of 77-9, Armadale | 8PC | 1962 |
| Simms | C. A. | Commonage, Kojonup | S4K | 1912 |
| Simms | C. A. | Commonage, Kojonup | S4K | 1924 |
| Simms | Chas. | Floral Farm, Williams. Hotel Quindanning, Quindanning | CZ3 | 1912 |
| Simms | Chas. | Hotel Quindanning, Quindanning; Floral Farm, Williams | CZ3 | 1924 |
| Simms | W. A. | Westlington Farm, Greenbushes | 2QS | 1924 |
| Simms & Styles | - | Rosedale, Bunbury | S4S | 1912 |
| Simms & Styles | - | Rosedale, Bunbury | S4S | 1924 |
| Simon | Felix A. | Nayliring, Piesseville | FS1 | 1927 |
| Simons | Ernest H. | Lot 233 and Commonage, Mt. Morgans | 5SO | 1924 |
| Simons | Walter L. | Yalgoo Commonage, Yalgoo | W1X | 1928 |
| Simper | G. | Moss Vale, Katanning | 9PS and 37B, 27A | 1962 |
| Simper | G. | Moss Vale, Katanning | 9SP and 37B, 27A | 1962 |
| Simper | Geo. | Moss Vale, Katanning | 9SP | 1912 |
| Simper | Geo. | Moss Vale, Katanning | 9SP | 1924 |
| Simper | T. J. | Wernup, Katanning | SP3 | 1912 |
| Simper | T. J. | Wernup, Katanning | SP3 | 1924 |
| Simpson | A. | Sunnside, Brunswick Junction | 0SN and 36B, 18A | 1962 |
| Simpson | A. A. | Pettison Park, Quairading | S4N and 15B, 30A | 1962 |
| Simpson | A. D. & G. D. | Gillimanning, East Pingelly | 6SA and 33B, 118E | 1962 |
| Simpson | A. G. & Co. | Mt. Magnet | WE2 | 1924 |
| Simpson | A. G. & Day, L. L. | Kurrajong Downs Station, Sandstone | KD2 | 1924 |
| Simpson | Alex. | Stanmore, Pallinup, via Gnowangerup | Z9N | 1924 |
