| Spagnolo & Palumbo | C. & G. | Peel Estate Lots 188-9, East Victoria Park | 6SC and 34C, 116E | 1962 |
| Spalding | A. W. | Glenullen, Wellington Loc. 3834, 3838, Capel | AS2 | 1962 |
| Spalding | T. D. | Bonnie Vale, Stirling Estate, Capel | TS8 | 1912 |
| Spalding | T. D. | Bonnie Vale, Stiring Estate, Capel | TS8 | 1924 |
| Spalding | W. D. | Loc. 375, Esperance | TS8 and 80D, 13E | 1962 |
| Spangenberg | H | Gosnells | SP8 | 1924 |
| Spangenberg | H. | Dairy Farm, Gosnells | SP8 | 1912 |
| Spanswick | W. F. | Dingering, East Wagin | W5S | 1912 |
| Spanswick | W. F. | Dingering, East Wagin | W5S | 1924 |
| Spargo | S. J. | Garden Gully, Meekatharra | 5NS | 1924 |
| Spark | A. | Redwing, Goomalling | 6TZ and 119D, 28E | 1962 |
| Spark | A. O. | Kiandra, Est Wickepin | S3K and 32C, 43A | 1962 |
| Spark | D. G. | Eungella, coolup | 3SK | 1962 |
| Spark | D. S. | Myarra Brook, Keysbrook | 3DS | 1912 |
| Spark | D. S. | Myarra Brook, Keysbrook | 3DS | 1924 |
| Spark | John | 86 Gate, E. Wickepin | 1JS | 1926 |
| Spark | M. J. | Laylands, Wickepin | 8MS and 6D, 105E | 1962 |
| Spark | Margaret | Inglewood Farm, Dorakin via Wickepin | A9A | 1912 |
| Spark | R. S. | Inglewood Farm, Dorakin | A9A | 1924 |
| Spark | R. S. | Moondyne, East Bullsbrook | 5SR and 34C, 113E | 1962 |
| Spark | S. R. & D. M. | 8323, 9299, 9705, Gutha | SS7 and 20D, 111E | 1962 |
| Spark | T. E. | Happy Valley, Dowerin | 9TS and 13B, 46E | 1962 |
| Spark | W. R. | Freshfields, Mt. Helena | M8S | 1962 |
| Spark Bros. | - | Donida, Wialki | D5J and 20C, 103E | 1962 |
| Sparkman | Alice L. B. | Lot 111, Mundijong | 3OZ | 1924 |
| Sparkman | O. | Lot 111, Mundijong | 3OZ and 107B, 7E | 1962 |
| Sparks | Owen | Stagaroona, Tweed Road, Bridgetown | QL5 | 1924 |
| Sparks | S. G. | Ballidu | XA9 | 1924 |
| Sparks Bros. | - | Wyena, Nelson loc. 11233, Dinninup | 8VS | 1962 |
| Sparling | P. | Kalgoorie and Boulder Dairy | 5PS | 1912 |
| Sparling | P. | Kalgoorlie and Boulder Dairy, Kalgoorlie | 5PS | 1924 |
| Sparling | Robt. WM. | Coyrecup, Katanning East | Z9S | 1924 |
| Sparrow | R. E. | Locs. 10445 and 11180, Nannup | X5S | 1962 |
| Spaven | H. J. | Nilemah, Sharks Bay | 1NE and 5B, 33A | 1962 |
| Speadman | R. P. | Stanthorn, Coolup | S5P | 1912 |
| Speadman | R. P. | Stanthorn, Coolup | S5P | 1924 |
| Speak | Herbert | Benwood Farm, Manjimup | 2HS | 1927 |
| Spear | H. | Leonora | 7SP | 1912 |
| Spear | H. | Leonora | 7SP | 1924 |
| Spears | I. A. | Wealherall, Boundain, Via Narrogin | W5S and 33B, 112A | 1962 |
| Speed | B & A. H. & Goss W. | Speedwell, Moonie's Hill via Tambellup | GO2 | 1912 |
| Speed | B. & A. H., & Goss. W. | Speedwell, Moonie's Hill via Tambellnp | GO2 | 1924 |
| Speed | L. B. | Darlingup, C. K., Arthur River | E3C | 1925 |
| Speedy | E. E. (Mrs) | Freshwater Pool, Yetna | E6Z and 3B, 9E | 1962 |
| Speedy | E. S. | Freshwater Pool, Yetna | E6Z | 1924 |
| Speedy | James Wm. | Freshwater Pool, Narratarra | JS7 | 1924 |
| Speedy | Jas. Wm. | Fresh Water Pool, Narra Tarra | JS7 | 1912 |
| Speer | George | Eversleigh, Bridgetown | YS1 | 1924 |
| Speer | L. | Eversleigh, Bridgetown | YS1 | 1962 |
| Speldewinde | E. R. | Victoria 100020, Coorow | S4E and 102C, 110E | 1962 |
