| Sturman | F. W. | Roe 1715, Kargarin | F2S and 34D, 42E | 1962 |
| Sturman | James | Dongarra | YS7 | 1912 |
| Sturman | James | Dongarra | YS7 | 1924 |
| Sturt Meadows Station | - | Sturt Meadows, Leonora | KY1 and 20B, 12A | 1962 |
| Sturt Pastoral Co. Ltd | - | Sturt Creek, East Kimberly | 7XX | 1924 |
| Sturt Pastoral Co. Ltd. | - | Sturt Creek, Alice Springs | 7XX and 25D, 24E | 1962 |
| Stuteland | E. C. | Wyndham | LN5 | 1912 |
| Stuteland | E. C. | Wyndham | LN5 | 1924 |
| Stutley | Chas. H. | Rock View, Broomehill | 6UU | 1912 |
| Stutley | Chas. H. | Rock View, Broomehill | 6UU | 1924 |
| Stutley | H. W. & V. J. | Moortvale, Kojonup 5418, Gnowangerup | 8HV and 119D, 31E | 1962 |
| Stutley & Sons | C. | Hillside View, Gnowangerup | 3CS and 10B, 71E | 1962 |
| Stutley & Sons | W. G. | Rockview and Mortvale, Gnowangerup | 6UU and 37B, 35A | 1962 |
| Styants | Louisa | Worsley Grant, Roelands | L3S | 1912 |
| Styants | Louisa | Worsley Grant, Roelands | L3S | 1924 |
| Styler | F. A. | 1913, 565, 3874-5, Beacon | F6A and 18B, 113E | 1962 |
| Styles | A. D. | Fairway, Coolup | 6DS and 108D, 48E | 1962 |
| Styles | Alfred Basil | Sandalvale, Yilliminning | Y0Z | 1924 |
| Styles | B. H. | Mannabutting, Highbury | Y0Z and 32B, 9A | 1962 |
| Styles | C. T. & H. M. | 419, 410, 293, 545, 506, 551, 502, Circle Valley | I5M and 25D, 108E | 1962 |
| Styles | Geo. | Clifton Area, Burekup | 4QS | 1924 |
| Styles | H. | Lynne Grove, Waroona | Y8O and 6B, 84E | 1962 |
| Styles | H. D. | Fernbrook, Manjimup | 1DS | 1962 |
| Styles | J. A. | All Bright, Waroona | XV5 | 1962 |
| Styyles | Geo. Fredk. | Hillerest, Yilliminning | S7Y | 1924 |
| Suark | T | Walyourmouring | 6TZ | 1924 |
| Subiaco Municipal Council | - | Municipal Pound, Subiaco | S4P | 1912 |
| Subiaco Municipal Council | - | Municipal Pound, Subiaco | S4P | 1924 |
| Suckling | A. & W. | Swamps, Northampton | SE8 and 43C, 35E | 1962 |
| Suckling | W. | Essex Farm, Northampton | N0Z and 102C, 37A | 1962 |
| Suckling | W. J. | Blue Hills, Northampton | XS5 and 11B, 46A | 1962 |
| Suckling | Wm. | Essex Farm, Northampton | N0Z | 1924 |
| Suckling & Co. | P. | Weine, Alma | 4PS and 38C, 116A | 1962 |
| Sudholtz | J. F. | Spring Gulley Farm, Waeel | S2Z | 1924 |
| Sudholz | A. J. | 2613, 2616, Piawaning | 6AS and 3D, 29E | 1962 |
| Sudholz | F. H. & A. J. | Locs. 20336, 9501, 3562, Meckering | 2FA and 11D, 80E | 1962 |
| Sudholz | J. R. (Mrs) | Remuera, Meckering | UM9 and 34B, 41A | 1962 |
| Sudholz | W. C. & H. M. | Coralons, Piawaning | W5C and 31B, 109A | 1962 |
| Sudholz & Co. | H. | Longview, Aldersing | 3RS and 21B, 116A | 1962 |
| Suding | Wm. | Wangoline, Yorkrakine | S5W | 1912 |
| Suding | Wm. | Wangoline, Yorkrakine | S5W | 1924 |
| Sudlow | T. P. | Kilgorrine, Wallacup, East Katanning | P4S | 1924 |
| Sue | J. A. | Sussex 2358-9-60-1-28-9-30-1, Ambergate, via Busselton | XS3 | 1962 |
| Suelarich | Martin | Block M.838, Three Springs | M8S | 1912 |
| Suelarich | Martin | Block M838 Three Springs | M8S | 1924 |
| Suell | Cyril L. | Avon Loe. 14138, Muckinbudin | QZ5 | 1924 |
| Suffield | J. W. | Marionup Station, Serpintine | Y7S | 1924 |
| Suffolk | Ernest H. | Yerupin, via Kellerberrin | 7EV | 1924 |
| Suffolk | Frank. | Loc. 15322, Mokami, via Kellerberrin | P5F | 1924 |
| Sugars | Jas. | Ascot Vale Estate, Belmont | 9JZ | 1924 |
