| Stewart | Thos. Allen | longview Farm, Harri-smith, via Narrogin | Z2A | 1924 |
| Stewart | W. | Locs. 1693, 1774, Miling, via Moora | U9T | 1924 |
| Stewart | W. | Gwent, Piawaning | 6SS and 16B, 7A | 1962 |
| Stewart | W. B. | Glen Turret, Borden | W4S and 8B, 114E | 1962 |
| Stewart | W. F. | Rocky Crossing, Geeralying, Via Highbury | WS6 and 43B, 103A | 1962 |
| Stewart | Wm. | Cauldemeade Est, Eujinyn Siding, Bruce Rock | 8NS | 1924 |
| Stewart & Co. | G. | Mandia Kian, Beverley | Z4G and 11B, 7A | 1962 |
| Stewart & Co. | I. A. C. | Glen Allister, East Pingelly | J5S and 47D, 13E | 1962 |
| Stewart & Co. | J. C. | Island Ford Murray Loc. 1033, Waroona | 4SU and 8D, 84E | 1962 |
| Stewart & Co. | J. M. | Rocky Glen, Kojonup | JS4 and 43B, 84A | 1962 |
| Stewart & Fraser | - | Avon Location 23178, Lake Brown, Via Nungarin | X9K | 1924 |
| Stewart & Loudon | - | Balmoral, Onslow | 0SL | 1912 |
| Stewart & Loudon | - | Balmoral, Onslow | 0SL | 1924 |
| Stewart & McPherson | T. D. & C. | Kingussie, East Wagin | S5M | 1912 |
| Stewart & Payne | - | C. P. No. 2316, Bridgetown | SP5 | 1912 |
| Stewart & payne | - | C. P. No. 2316, Bridgetown | SP5 | 1924 |
| Stewart & Son | - | Clay Bank, Wadderin | S2U | 1924 |
| Stewart & Son | T. D. | Glenalmond, Gnowangerup | 5OS and 71B, 4A | 1962 |
| Stewart & Sons | Fergusson James E., Edmund Athole | Baledmund, Wongan Hills | FS0 | 1927 |
| Stewart & Wehl | - | Bonney Downs, Nullagine | S1W | 1912 |
| Stewart & Wehl | - | Bonney Downs, Nullagine | S1W | 1924 |
| Stewart & Wehl | - | Sylvania, Nullagine | W1Q | 1924 |
| Stewart & Wehl | - | Byrah Station, Peak Hill | 1HF | 1925 |
| Stewart Bros. | - | Yooralling Farm, Cunderdin | S4D | 1912 |
| Stewart Bros. | - | Yooralling Farm, Cunderdin | S4D | 1924 |
| Stewart-Dawson | B. M. | Hotel Wandering, Wandering | BM4 and 13D, 104E | 1962 |
| Stibbings | Sydney | Blocks 104 to 108 | ES8 | 1912 |
| Stibbs | Arthur Jno | Prop. Coal Mines of W.A. Collie | 8SV | 1924 |
| Sticken | Ernest A. | Roe Locs. 476 and 705, Newdegate | Y9N | 1925 |
| Sticken | Ernest August | Roe Locs. 476 and 705 Newdegate | 3ES | 1926 |
| Sticken | W. J. | Loc. 11486, Lake Grace | Z5O | 1924 |
| Stickland | C. | Avon 22819, 14331, 14350, 19374, 9973, 13934, 16706, 13121, 20975, Wongan Hills | ZS6 and 44B, 118E | 1962 |
| Stickland | C. H. | Locs. 22034, 8904, 13847, 16893, 13857, 25047, 24314, Wongan Hills | 2KS and 21C, 110E | 1962 |
| Stickland | F. G. | Ninghan 1554-5, 2368-2661, Wongan Hills | FS4 and 43C, 39A | 1962 |
| Stickland | G. J. | Jeralgene, Wongan Hills | 6GS and 30D, 71E | 1962 |
| Stickland | V. | Ninghan 1132, Burakin | V0S and 1C, 46A | 1962 |
| Stickland | W. E. C. | Valley Farm 16106, 20975, 13860, 10259, 10258, 8031, 18227, 19436, Wongan Hills | 2WS and 36B, 110E | 1962 |
| Stickney & Son | - | Croydon Station, Roebourne | 7CC and 29D, 20E | 1962 |
| Stickney & Son | - | Mallina Station, Roebourne | V1N and 84B, 15A | 1962 |
| Sticpwich | Wm. T. | Braxton Farm, Bridgetown | U5S | 1924 |
| Stidworthy | F. H. | Woolumba, Nungarin | S3F | 1912 |
| Stidworthy | F. H. | Woolumba, Nungarin | S3F | 1924 |
| Stidworthy | M. E. | Lake View, Jarring | 3XF | 1924 |
| Stidworthy & Griffen | - | Lake Grace, via Dunbleyung | US3 | 1924 |
| Still | S. G. | Fitz. Locs. 518 481 and 237, Esperance | 5NY | 1924 |
| Still | W. | Sussex 2207-8, Cowaramup | 8YN | 1962 |
| Stingemore | R. D. | Ninghan Loc. 2988, Beacon | 5RS and 4C, 49E | 1962 |
| Stinton | A. L. | Sussex 2052, 2125-6, 238, Busselton | LA9 and 56F, 14B | 1962 |
| Stinton | E. | Pleasant Grove, Mandurah | AE3 | 1912 |
| Stinton | E. | Pleasant Grove, Manurah | AE3 | 1924 |
