| Spiers | Robt H. | 27 Charles Street, West Perth | X7Y | 1924 |
| Spiller | H. | Mokami Farm, Erikin | 2SR and 45C, 11A | 1962 |
| Spiller | W. | Coolup AA Lot 111, Pinjarra | WS6 and 32C, 107E | 1962 |
| Spillman | A. M. | Hill Farm, Baandee | S5X | 1924 |
| Spillman | D. J. | Mawido, baandee | D5S | 1924 |
| Spillman | H. D. & R. M. | Mawida, Baandee | D5S and 11B, 31E | 1962 |
| Spillman | J. W. | Alma, Baandee | 5SZ | 1924 |
| Spillman | J. W. | Locs. 11393, 18403, Baandee | 5SZ and 11C, 67E | 1962 |
| Spirek | J. & B. | Maclare, Bullsbrook | GE3 | 1962 |
| Spiroff & Ylioff | - | Nelson Loc. 9467-9-6, Manjimup | 1YU and 106B, 43A | 1962 |
| Sponge | Arthur | Avon location 22172, Eureka farm, Merriden | QZ3 | 1924 |
| Spooner | P. G. | Collanilling House, East Wagin | SP1 and 35D, 112E | 1962 |
| Spork | John C. | Liseard Farm, Carnamah | 4YQ | 1925 |
| Sporn | Chris | Block 41, Coolup | QS3 | 1924 |
| Sport | John | Watheroo, Watheroo | 9PQ | 1925 |
| Spouse | John | Grass Vale, Tenterden | J6S | 1912 |
| Spouse | John | C.P. 9243/55, Narrogin | J6S | 1924 |
| Spouse & Son | - | Rose Valley, Narrogin | J6S and 20C, 7A | 1962 |
| Spragg | W. J. | Allandale, Popanyinning | 9WX | 1924 |
| Spragg Bros. | - | Acaroona, E. Popanyinning | ZP3 | 1924 |
| Spratt | F. & E. | Woolundra, Doodlsakine | 9SE | 1912 |
| Spratt | F. A. | Burnbrae, Tenterden | 3SF and 3SF (horns) and 28D, 34E | 1962 |
| Spratt | F. G. E. | Carmunning Park, Wagin | 9SE | 1924 |
| Spratt | Frank | Rest Farm, Wagin | 3SF | 1912 |
| Spratt | Frank | Grass Vale, Tenterden | 3SF | 1924 |
| Spratt | W. J. (jnr) | Loc. 1015-6-9-7, 1008, Kumarl | AS0 and 42C, 9A | 1962 |
| Spratt | W. J. (jnr) | Dunville, Kumarl | E4D and 5B, 46E | 1962 |
| Spratt | W. J. (snr) | Theha, Kumarl | 6WS and 84D, 54F | 1962 |
| Spreadbury | Emily | Newearnie | EZ3 | 1924 |
| Sprigg | A. | Strathallen, Wagin | AS6 | 1912 |
| Sprigg | A. | Rest Farm, Wagin | AS6 | 1924 |
| Sprigg | A. J. | Brighton Farm, Narrogin | J9S and 23B, 67E | 1962 |
| Sprigg | D. A. | Strathallen, Wagin | AS6 and 41B, 58F | 1962 |
| Sprigg | D. J. | Carmunning Park, Wagin | D5S | 1912 |
| Sprigg | E. R. | Strathalbyn, Tambellup | ES6 and 33D, 4E | 1962 |
| Sprigg | F. A. (Mrs) | Smithies Run, Bonnie Brook | 4SX and 43B, 102A | 1962 |
| Sprigg | G. E. & W. J. | 18328-9, Narembeen | 4JS and 20B, 48E | 1962 |
| Sprigg | H. E. & H. T. | Elsinore, East Wickepin | UF3 and 10D, 120E | 1962 |
| Sprigg | H. W. | Pine Grove, Wialki | I3S and 10B, 120A | 1962 |
| Sprigg | James Jun. | Brentwood, Wagin | J9S | 1912 |
| Sprigg | James Junior | Mailings, Wagin | J9S | 1924 |
| Sprigg | James Sen. | Mailings, Wagin | Z7L | 1912 |
| Sprigg | James Senior | Strathallen, Wagin | Z7L | 1924 |
| Sprigg | L. S. | Brentwood, Wagin | S4G and 31D, 41E | 1962 |
| Sprigg | M. H. & C. A. | Marton, Boyunup Brook | S5V and 10B, 40A | 1962 |
| Sprigg | P. & S. | Sunny View, Bonnie Rock, Via Mukinbudin | N7P and 22C, 104A | 1962 |
| Sprigg | Stanely | Dandyking, Pingelly | S4G | 1912 |
| Sprigg | Stanley | Brentwood, Wagin | S4G | 1924 |
| Sprigg | T. | Woolundra, Doodlakine | TS4 | 1924 |
| Sprigg | W. G. | Burwood Farm, Bonnie Rock | 5WS and 17B, 19E | 1962 |
