| Jacobson | E. | Avon 11883-4, Trayning | 1QJ and 102B, 8E | 1962 |
| Jacobson | Jobshua | Mooney Street, Bayswater | J0S | 1928 |
| Jacoby | Agnes | Pall Mall, Culham | FU9 | 1924 |
| Jacoby | H. G. | Waverley, Brookton | J5Y | 1924 |
| Jacques | Frank Sydney | Normanhurst, Juropine Hill, Quairading | J8Q | 1924 |
| Jacques | Walter | Catchment Area, Sawyers' Valley | W0Z | 1924 |
| Jaekel | Henry | Loc. 339, Ongerup | H6X | 1924 |
| Jaekel & Son | E. F. | 288, 197, 284, 154, 153, 156, 145 Jarbunkenup, Ongerup | X6J and 106D, 10E | 1962 |
| Jaensch | A. J. | Roe Loc. 624, Newdegate | KQ6 | 1924 |
| Jaensch | A. J. | Roe 502, 1253, Newdegate | 1AJ and 32B, 13A | 1962 |
| Jaensch | A. J. | Springfield, Beverley | KQ6 and 12C, 50E | 1962 |
| Jaensch | A. L. | Ashfield, Lake Grace | 76E and 33E, 22D | 1962 |
| Jaensch | E. F. T. | Avon Bend, East Brookton | 2HW | 1912 |
| Jaensch | E. F. T. | Avon Bend, East Brookton | 2HW | 1924 |
| Jaensch | John F. | Spring Hill Farm, Narrogin | Z2J | 1924 |
| Jaeschke | P. E. H., R. G & C. F. | Penrhyn, Moora | 7EQ and 59F, 34C | 1962 |
| Jaeschke | P. E. M, R. G. & C. F. | Colray Farm, Wubin | 4JK and 36A, 50B | 1962 |
| Jaffer | - | Commonage, Port Hedland | 6AF | 1912 |
| Jaffer | - | Commonage, Port Hedland | 6AF | 1924 |
| Jaffer | A. J. | Wilpena Park, Mt Barker | A5J and 17C, 104E | 1962 |
| Jaffer | A. S. & A. | Melbourne Loc. 935, 887, 1305,377, Yericoin | J1V and 7C, 48E | 1962 |
| Jagger | R. | Avon Locs. 20004-3, Nungarin | 5RJ and 84A, 26B | 1962 |
| Jagger & Fairhead | - | Locs. 25480, 20258, 9-60, Nungarin | CJ8 and 11D, 84E | 1962 |
| Jago | C. W. | Lyndale, Wickepin | CJ7 and 103A, 41B | 1962 |
| Jago | G. | Locs. 1919, 6880, Kojonup | JE5 and 27B, 48E | 1962 |
| Jago | John | Eastville, East Narrogin | GJ2 | 1912 |
| Jago | John | Eastville, East Narrogin | GJ2 | 1924 |
| Jago | N. R. | Locs. 8563, 7458, 8756, Wickepin | 5NJ and 28A, 16C | 1962 |
| Jahn | A. W. | Pt. 6649-8, Lots, 16, 13, 15, Wundowie | AW0 and 14A, 46B | 1962 |
| Jakovich | Geo. | Solta, Kellerberrin | 0GJ | 1924 |
| Jakovich | George | Solta, Kellerberrin | 0GJ | 1912 |
| Jama | Khan | Goldfields, East Murchison | K0J | 1912 |
| Jama Khan | - | Goldfields, East Murchison | K0J | 1924 |
| James | A. | Llancells, Dumbleyung | J9E and 13C, 67E | 1962 |
| James | A. W. | Queenslea, Frankland | J1Q and 20B, 80E | 1962 |
| James | A. W. & G. | Carnie Grange, Wanneroo | UM1 | 1926 |
| James | A.W. | Melbourne Loc. 2623, Bolgart | K5J | 1924 |
| James | Alex | Dunjelon Estate, Dumbleyung | 9AJ | 1912 |
| James | Alex. | Dunjelon Estate, Dumbleyung | 9AJ | 1924 |
| James | Alfred | Toodyay | 9ZA | 1924 |
| James | Arthur | Bridgetown Sub. Lots 50 & 53, Box 54, Bridgetown | AJ1 | 1926 |
| James | B. G. | Colwyn, Dumbleyung | 2JZ and 17C, 30E | 1962 |
| James | C. H. | Binker Homestead, Northam | XJ4 | 1962 |
| James | Caleb | Carlaminda, Wyalcatchem | 4VJ | 1924 |
| James | Chas. | Townsite, Roebourne | N30 | 1924 |
| James | Chas. Hy. | Eddington, Narrogin | CJ7 | 1912 |
| James | Chas. Hy. | Eddington, Narrogin | CJ7 | 1924 |
| James | E. H. | Hillside, Kelmscott | 4EJ | 1962 |
| James | F. A. | Lot 385, Serpentine | F3J and 118B, 18A | 1962 |
| James | F. J. | Wyanora, Northampton | FJ7 and 50C, 115E | 1962 |
