| Scanlon | T. F. | Hilltop, Wagin | T9S and 1C, 6E | 1962 |
| Scanlon | T. P. | Hill Top Farm, Wagin | T9S | 1912 |
| Scanlon | T. P. | Hill Top Farm, Wagin | T9S | 1924 |
| Scantlebury | W. C. | West Road, Swan 1546. Bullsbrook | S0Y | 1962 |
| Scarfe | Edwd. | Avon Loc. 21991, Narembeen | Q3Z | 1924 |
| Scarfe | R. | Rocky Gully, Bowes | QS9 | 1924 |
| Scarff | Walter Wm. | (Mail Contractor), Commonage, Onslow | 9VC | 1912 |
| Scarff | Walter Wm. | Onslow (Mail Contractor) | 9VC | 1924 |
| Scarlett | C. R. | Riamm Singh Farm, Cunderdin | 2CS and 42B, 115E | 1962 |
| Scarlett | Ed. J. | Burracoppin, Burracoppin | ES9 | 1912 |
| Scarlett | Ed. J. | Burracoppin | ES9 | 1924 |
| Scarlett | R. A. | Deredis Farm, Preston | 0XR | 1912 |
| Scarlett | R. A. | Deredis Farm, Preston | 0XR | 1924 |
| Scarlett | W. H. & R. G. | Oakstead, Korrelocking | Y3S | 1924 |
| Scarr | Herbert | Brooklands, Balingup | KZ2 | 1924 |
| Scattini | J. | Kanowna | 5YV | 1924 |
| Sceresini | P. & A. | 109, 116 Wilson Street, Cookernup | WD1 and 103B, 10E | 1962 |
| Schafer | M. N. | Pt. Swan Loc. 2, 1372, Bindoon | M7S and 51F, 3B | 1962 |
| Schaffner | G. E. | Plantagenet 552-3, King River, Albany | 3GS and 38B, 8A | 1962 |
| Schanna & Muzeffer Khan | - | Wyndham | M2Z | 1924 |
| Schell | Albert | Morna, Goomalling | 3AS | 1912 |
| Schell | Albert | Morna, Goomalling | 3AS | 1924 |
| Schell | Arthur | Ely, Goomalling | 2MS | 1912 |
| Schell | Arthur | Ely, Goomalling | 2MS | 1924 |
| Schell | J. F. | Tamination, Goomalling | 3FS and 16B, 15A | 1962 |
| Schell | M. L. | 2694 and 2697, Wanneroo | 1MS and 52F, 12B | 1962 |
| Schell | R. & W. | Ely Farm, Goomalling | 2MS 36B, 24E | 1962 |
| Schell & Son | A. | Hatherley, Goomalling | 3AS and 33C, 28E | 1962 |
| Schell & Sons | E. | Hatherley, Goomalling | ES1 | 1912 |
| Scheltes | J. | 97-8, Kenwick | 7SS and 112B, 114A | 1962 |
| Scherini | J. | Kojonup Locs. 6512 and 5666, Kojonup | 1JS and 24B, 12A | 1962 |
| Scherini | V. | 7391, 8085 Kojonup Locs., Kojonup | VS7 and 5B, 48A | 1962 |
| Scherning | A. A. | Block 10734, Baandee, South | 9SA | 1912 |
| Scherning | A. A. | Block 10734, Baandee South | 9SA | 1924 |
| Schertzinger | Caroline | Freemasons' Hotel, Toodyay | KS5 | 1924 |
| Schilling | H. D. | Avon Rock Vale Locs. 19321, 20200, Bruce Rock | 4HS and 4C, 111E | 1962 |
| Schilling | R. A. | Glen Avon Farm, Narembeen | R6S and 31B, 108A | 1962 |
| Schilling | R. C. & V. E. | Eldora, Narembeen | S9R and 103D, 115E | 1962 |
| Schilling & Co. | C. | 9448, 15891, 21035, 15899, 6448, Bruce Rock | 0CS and 5B, 105A | 1962 |
| Schinzig | C. W. | Glensyde, Darkan | WF9 and 21C, 13A | 1962 |
| Schinzig | E. A. | Kojonup 3307, 6811, 4724, 3646, 8739 and Pts. 5527, 1811, Kojonup | EA1 and 5B, 29A | 1962 |
| Schinzig | H. I. | Craigmoor, via Kojonup | RS4 and 13D, 12E | 1962 |
| Schinzig | J. R. | Mokup, via Kojonup | VM0 and 31D, 34E | 1962 |
| Schinzig | K. & F. | Eulinhop, Kulikup | 2SK and 30B, 47E | 1962 |
| Schinzig | L. E. | Wellington 3134, 1401, 1540, 2581, 2597, 2596, Darkan | S6L and 110B, 31A | 1962 |
| Schinzig | L. G. | Mokup Springs, Moodiarrup | ZA0 and 10C, 15E | 1962 |
| Schinzig | R. F. | Northcliffe, Darkan | 1SZ and 46B, 20E | 1962 |
| Schinzig | R. F. & H. I. | Hillmans River, Darkan | ZF1 and 32C, 104E | 1962 |
| Schinzig | Rudolph | Dardanup Park, Dardanup | RS4 | 1912 |
| Schinzig | Rudolph | Dardanup Park, Dardanup | RS4 | 1924 |
