| Jaurdi Station | - | Juardi Station, Boorabbin | KP6 and 43D, 107E | 1962 |
| Javens | A. & V. W. | Eriswell & Kenilworth, Upper Blackwood, via Kojonup | V3J | 1912 |
| Javens | A. & V. W. | Eriswell & Kenilworth, Upper Blackwood, via Kojonup | V3J | 1924 |
| Javens | David | Scott's Brook, Bridgetown | A4Z | 1924 |
| Javens | H. P. | Nelson Loc. 7963, Kulikup | 2YP | 1924 |
| Jay | Hubert Frank | Sleepy Hollow, Yanmah, Manjimup | H1J | 1928 |
| Jay | J. W. R. | Locs. 8881-7-8, Northcliffe | J7Y | 1962 |
| Jay | Mrs A. | Yeediboolja, Youanme | Q0J | 1924 |
| Jay Bros. | - | Yorbu, Pigeon Rocks via Mt. Jackson | JY0 | 1912 |
| Jay Bros. | - | Yorbu, Pigeon Rocks, via Mt. Jackson | JY0 | 1924 |
| Jeanes | Mrs C. C. | Lockyer avenue, West Northam | LN9 | 1924 |
| Jebarjup Pastoral Co. | - | Nukenullup and Jebarjup, Mt. Barker and Cranbrook | JP6 and 54F, 10D | 1962 |
| Jebb | A. | Avon Loc. 16971-7, Muntadgin | EJ4 and 3D, 48E | 1962 |
| Jecks | Alfred | Block 10, Panoramic Estate, Kalamunda | UJ1 | 1912 |
| Jecks | Alfred | Block 10, Panoramic Estate, Kalamunda | UJ1 | 1924 |
| Jecks | S. D. | Lot 123, Hazelmere | SJ9 | 1962 |
| Jeedamya Pastoral Co. | - | Jeedamya Station, Jeedayma Siding, Kalgoorlie | EA2 and 24E, 14B | 1962 |
| Jeeks | William | Swan Loc. 9, Maida Vale | 5YJ | 1924 |
| Jefferies | A. G. & E. M. | The Morrells, Woodanilling | 9JF and 19D, 55F | 1962 |
| Jefferies | A. L. & L. | 8731 Victoria Loc., Watheroo | A3J and 103A, 2C | 1962 |
| Jefferies | G. L. | Homestead, Katanning | 9JF | 1912 |
| Jefferies | G. L. | Homestead, Katanning | 9JF | 1924 |
| Jefferies | J. C. | Warrah, Wagin | 8JU and 115A, 47B | 1962 |
| Jefferies | J. J. | Bakers Wells, Northampton | JY1 | 1962 |
| Jefferies | N. C. | Hay Locs. 1005, 850, 616, Tenderden | Z3J and 25B, 32E | 1962 |
| Jefferies | W. H. & M. L. | Warrah, Latham' Siding | Z7J | 1924 |
| Jefferies & Co. | V. E. & M. E. | Treetops, Waroona | BZ6 and 84C, 4A | 1962 |
| Jefferies & Coppin | Jno. & C. W. & H. C. J. | Lalla Rook, via Pt. Hedland | E7O | 1924 |
| Jefferson | George | Yongerup, Mt. Many Peaks, View Street, Albany | Z7Q | 1925 |
| Jefferson | J. H. | Nourning Spring, Brookton | 0JJ and 57F, 24B | 1962 |
| Jefferson | J. S. | Sunny Hill, Mullalyup | J8J | 1912 |
| Jefferson | J. S. | Sunny Hill, Mullalyup | J8J | 1924 |
| Jeffery | A. E. | Block 77, Stephen Street, Queen's Park | 4PJ | 1912 |
| Jeffery | Albert | Hazeldene, Tambellup | Q2J | 1924 |
| Jeffery | James | Yarranup, Kojonup | 0JJ | 1912 |
| Jeffery | James | Yarranup, Kojonup | 0JJ | 1924 |
| Jeffery | James | The Downs Farm, South Yuna | Z0J | 1924 |
| Jeffery | James | Gisborne Park, Wagin | A2W | 1925 |
| Jeffery | Jas. H. | Stratham, Donnybrook | J9Y | 1924 |
| Jeffery | R. | Springdale Farm, Boundain, Narrogin | 8GQ | 1927 |
| Jeffery | Wm. | Marranup, Kojonup | FJ3 | 1912 |
| Jeffery | Wm. | Marranup, Kojonup | FJ3 | 1924 |
| Jefferyes | Eustace | The Glen, Allanson, via Collie | EY4 | 1924 |
| Jefferys | J. E. | Newlands, Walgooian | 4EJ and 119A, 19B | 1962 |
| Jeffree | C. E. | Faraway, Kellerberrin | CJ1 and 71D, 120E | 1962 |
| Jeffrey | A. E. | Block 77, Stephen Street, Queen's Park | 4PJ | 1924 |
| Jeffrey | Chas. | Diorite King via Leonora | C2J | 1912 |
| Jeffrey | Chas. | Diorite King, Leonora | C2J | 1924 |
| Jeffrey | Est. of J. H. | Stratham, Doonybrook | J9Y | 1962 |
| Jeffrey | G. L. | Yallambee Loc. 16899, 17612, Bilbarin | P7P and 32C, 34E | 1962 |
