| Gould & Patten | - | Kelvin Park, Minnivale | 4GP | 1912 |
| Gould & Patten | - | Kalvin Park, Minnivale | 4GP | 1924 |
| Gould & Son | J. L. | East Lynn, Geraldon | V5G and 102C, 3E | 1962 |
| Goundrey | G. F & M. E. | Plantagent 5622, 2792, 2738, 2728, 3339, 258, 4665, Mt Barker | XG4 and 7C, 36E | 1962 |
| Gourlay | Andrew Buchanan | Roe Loc. 619 Newdegate | GQ3 | 1924 |
| Gower | I. E & J. | Block 9, Jingalup Estate, Kojonup | E6J | 1962 |
| Gowland | Stephen | Lot 9 Hamel | ZG4 | 1924 |
| Gowman | Thos. | Exon Farm, Pinjarra | XN1 | 1912 |
| Gowman | Thos. | Exon Farm, Pinjarra | XN1 | 1924 |
| Gowndrey | F. S. | St Werburghs Mount Barker | XG4 | 1924 |
| Goyder | D. J. | Roelands Estate, Roelands | 7DG | 1924 |
| Goyder & Davies | - | Llamguydir, Wickepin | XX2 | 1912 |
| Goyder & Davies | - | Llamguydir, Wickepin | XX2 | 1924 |
| Goyder & Son | D. B. | Kenton, Keysbrook | 7DG and 37B,104A | 1962 |
| Gozzi | A. | Nelson Locs. 66756, 7816, Boyup Brook | HR5 and 13C, 104A | 1962 |
| Grace | Est. of D. W. | Avon Locs, 26253, 16715, 11958, 19641, 22005, 24971, 25134, 24148, Wayalkatchem | D7G and 102A, 39C | 1962 |
| Grace | Jas. | South Carling Springs, Dangin | 2GJ | 1912 |
| Grace | Jas. | South Carling Springs, Dandin | 2GJ | 1924 |
| Grace | S. C. | Locs, 17175, 24058, Wyalkatchem | 0HG 44A,3C | 1962 |
| Grace | William H. | Farm, Kooreclocking | H0G | 1924 |
| Grace & Doyle | - | Gwalia | G9D | 1924 |
| Gracemere Pty. Ltd. | - | Gracemere, Coomberdale | D6H and 7C119E | 1962 |
| Gradey | Jno. | Marley, York | 3GG | 1912 |
| Gradey | Jno. | Marley, York | 3GG | 1924 |
| Gradinaru | W. | Plantagent 2135, Denmark | G0W and 2D, 57F | 1962 |
| Grady | Michael | Dangin, via York | 5GR | 1924 |
| Graffin | A. T. | A. 791, Cuballing | TG2 and 80B, 21A | 1962 |
| Graffin | Daniel | Corbley, Wagin East | Q0X | 1925 |
| Graham | A. | Wellington 1127-8 ( Pts.). Allanson, via Collie | B9M and 80B, 29E | 1962 |
| Graham | Alexander | Nardie Station, Stratton | XG3 | 1924 |
| Graham | Alexander D. | Springdale Farm, Broomehill | 7ZO | 1924 |
| Graham | Andrew Stirling | Roe Locs. 209 and 736, Graball via Narembeen | A3G | 1926 |
| Graham | Ann M. | Carnarvon Commom, East Carnarvon | OA8 | 1924 |
| Graham | Archibald | Common, Bullfinch | UG8 | 1924 |
| Graham | B. K. | Clevedon, Kondiniu | 7KG and 115A,24B | 1962 |
| Graham | D. H. | Williams Loc. 1754, 1383-4, 1381, Pt. 1380, 1477, Pt. 1235, Narrogin | DG4 and 108E, 27D | 1962 |
| Graham | D. J. | Avon Loc. 9276, Benjaberring | 8DJ | 1912 |
| Graham | D. J. | Avon Loc. 9276 Benjabering | 8DJ | 1924 |
| Graham | D. J. & M. G. | Robinson Estate Loc. 33, Albany | DG1 and 111A, 50B | 1962 |
| Graham | David | Cardiff, Collie-Cardiff | 6GK | 1924 |
| Graham | Edward H. | Commonage Carnarvon | MS7 | 1924 |
| Graham | Eucla C. | Yindi, Kurnalpi | EU1 | 1924 |
| Graham | F. G. | Locs. 19530, 21709, Kondinin | 9FG and 30B, 108A | 1962 |
| Graham | F. J. & U. M. | Hollinwood, West Pingelly | H3P and 13B, 3A | 1962 |
| Graham | G. D. & J. | Goyra, Esperance | G0R and 91F, 14D | 1962 |
| Graham | G. Est. | Jilbadgi 33, 141-44-48, Carrabin | GX2 and 49D, 29E | 1962 |
| Graham | G. W. | Little Tran, Muchea | W1G and 40D, 80E | 1962 |
| Graham | George | Mountain Made Farm, Westonia | GX2 | 1924 |
| Graham | Gordon | Harlow Farm, Karlgarin, via Kondinin | 6GQ | 1925 |
| Graham | H. | Loc. No. 6558, Ptn 6016, Wabkinup, via Kojonup | H1G and 33C, 9A | 1962 |
