| Sellner | B. W. | Benly, Perenjori | 0BS and 44C, 25E | 1962 |
| Sells | M. C. | Glenroy, Bridgetown | SV9 | 1962 |
| Selway | Doric John | Dampawa, Three Springs | D3Z | 1924 |
| Selway | Kate | Swan District | K1S | 1924 |
| Semken | Herbert | Mossvale, Donnybrook | HS5 | 1912 |
| Semken | Herbert | Mossvale, Donnybrook | HS5 | 1924 |
| Semken | J. C. | Leonora | C5S | 1912 |
| Semken | J. C. | Leonora | C5S | 1924 |
| Semmens | C. A. H. | 1760-1, Busselton | SR9 | 1962 |
| Semmens | G. F. | Loc. 2323-4, Ambergate, via Busselton | K4N and 14D, 31E | 1962 |
| Semmons & Wheatley | - | Loc. 1878, Boulder City | 5YO | 1924 |
| Semple | R., jun. | Merry Hills, Jandakot | ZS8 | 1924 |
| Senior | Elsie Olive | Warialda Farm, South Tammin | 4SX | 1924 |
| Senior | F. | The Rapids, Mardella | 6FS and 106B, 31E | 1962 |
| Senior, Inglis & Piercy | - | Lake Mason Station, Sandstone | Z0Y | 1924 |
| Sennar | Balooch | Wyndham | 4KS | 1924 |
| Separovic | B. Z. | 20587-8-9, 21630-1, 26961, Wundowie | 7ZS and 21C, 22A | 1962 |
| Sergeant | F. G. | Oaklands, Denmark | FG9 | 1912 |
| Sergeant | F. G. | Oaklands, Denmark | FG9 | 1924 |
| Serio | C. A. & S. V. | Fregayan, Wongan Hills | J4F and 13C, 80A | 1962 |
| Serjeant | Frank A. | Wellington Loc. 50a, Lots 132 and 133, Harvey | A5S | 1928 |
| Sermon | B. & B. | 280, 1439, 1442, 1441-3-7, Ballidu | 0BJ and 20D, 108E | 1962 |
| Sermon | E. J. | Brook-Vale, 7553, 6538, 10394, 16028, 13234, Tammin | S3Z and 40B, 110A | 1962 |
| Sermon | H. P. | Moonlight Flats, Quairading | H5P | 1912 |
| Sermon | H. P. | Moonlight Flats, Quairading | H5P | 1924 |
| Sermon | H. V. | Victoria 8321, 8325, Gutha | 0VS and 56F, 46D | 1962 |
| Sermon | J. W. K. | Pt. 1 Loc. e, Northam | KS0 and 34B, 48A | 1962 |
| Sermon | L. & W. | Tank Farm, Grass Valley | 9RS and 14C, 29E | 1962 |
| Sermon | P. W. J. | Prairie Farm, Gutha | P5S and 116D, 11E | 1962 |
| Sermon | R. C. | Tank Farm, Grass Valley | 9RS | 1912 |
| Sermon | R. C. | Tank Farm, Grass Valley | 9RS | 1924 |
| Sermon | T. W. & B. F. | Victoria 2369, 1544, 1542, Kondut | TS7 and 25B, 21A | 1962 |
| Sermon & Son | A. M. | Moogakine, Grass Valley | A7S and 34B, 119A | 1962 |
| Serpentine Jarrahdale Road Board | - | Mundijong Pound, Mundijong | S6J | 1962 |
| Serra | J. C. | Lot 75, Gidgegannup | 5JS and 12B, 112E | 1962 |
| Sertorio | A. L. | Spring Hill, Acton Park | KS4 | 1962 |
| Sertorio | L. & E. | Lot 37 Swan Loc. Chidlow | 8ES and 25B, 40E | 1962 |
| Servaas | J. & J. | Lot 411 Frederick St., Navel Base | 2JS | 1962 |
| Seskas | A. J. & E. F. | 27674, Bakers Hill | 5FS and 45C, 106A | 1962 |
| Seton | C. | Locs. 2373, 2069, 2113, 853, 2841-2, Wubin | 9KX and 7D, 49E | 1962 |
| Settineri | B. | 292 Yilgarn, Westonia | 0BS and 9B, 111A | 1962 |
| Settineri | G. & G. | 991, 995, 997, Bodallin | 0SG and 111B, 24A | 1962 |
| Settor | Aug. | Hainault, Wokalup | AS2 | 1912 |
| Settor | Augustus | Hainault, Wokalup | AS2 | 1924 |
| Sevelj | I. | St. Mary, Pinjarra | SY4 and 42B, 6A | 1962 |
| Severin | Alf. E. | Forest Glen, Woodanilling | E8S | 1912 |
| Severin | Alf. E. | Forest Glen, Woodanilling | E8S | 1924 |
| Severin | C. | Brocklesby, Woodanilling | 8CN | 1912 |
| Severin | C. H. | Lot 27 Loc. 24, Belmont | 0ZS | 1962 |
| Severin | H. J. | Town Lot 116, Woodanilling | 6SN | 1912 |
