| Johnston | W. D. | Eleura Park, Capel | J5X | 1962 |
| Johnston | W. G. & D. E. | Karmadona, Yoongarilup, via Busselton | J0Z and 4B, 13A | 1962 |
| Johnston | W. G. & D. E. | Karmadona, Yoongarilup, via Busselton | JO5 and 4B, 13A | 1962 |
| Johnston | W. H. | Avon Loc. 10747, 13940, Bilbarin | WJ8 and 119A, 48B | 1962 |
| Johnston | W. W. L. | Locs. 365, 2336-40, Busselton | 7LJ | 1962 |
| Johnston | William E. | Avondale, Merredin | W3J | 1927 |
| Johnston | Z. R. | 1860-1-3, Busselton | Y2P | 1962 |
| Johnston & Chapman & Johnston | W. & F. & B. C. | Ringwood, Upper Preston | 1FJ | 1924 |
| Johnston & Chapman & Johnston | W. & F. & B. C. | Ringwood, Upper Preston | J5J | 1924 |
| Johnston & Co. | A. B. | Nilamongup, Gnowangerup | NJ3 and 13B, 10E | 1962 |
| Johnston & Co. | A. C. | Berringa, Bokal | BJ7 and 37B, 71A | 1962 |
| Johnston & Son | H. G. | Merna, Dangin | HJ4 and 36D, 35E | 1962 |
| Johnston & Son | J. | Cockburn Sound A.48, Murray 1121,1233, 1318, 1323, Dandalup | J0U | 1962 |
| Johnston & Son | J. | Nairnholm A. 48, North Dandalup | JJ6 and 108B, 80E | 1962 |
| Johnston & Son | P. | Lloalong, Nyabing | AQ1 and 117D, 10E | 1962 |
| Johnston & Sons | H. C. | Torrens HIll, Toodyay | 0VO and 11B, 33E | 1962 |
| Johnston & Sons | J. | Nairnholm A.48, North Dandalup | JJ6 and 108B, 80E | 1962 |
| Johnston & Sons | J. W. & H. C. | Pine View, Duninin | 1ZJ and 29B, 118A | 1962 |
| Johnston & Sons | W. O. | Abattoirs, Midland Junction | W0J and 25A, 47B | 1962 |
| Johnston & Sons, Est. | T. | Reutenburn, Trayning | TJ7 and 47B, 31E | 1962 |
| Johnston Bros. | | Keswick, Tambellup | JJ2 | 1912 |
| Johnston Bros. | - | Keswick, Tambellup | JJ2 | 1924 |
| Johnston Bros. | - | Leschenault, Bunbury and Esperance | 1FJ and 67B, 22A | 1962 |
| Johnston Bros. & Stafford | | Araluen Farm, Broomehill | 2JY | 1912 |
| Johnstone | C. R. | Loc. 7880, Williams | JN0 and 21D, 59F | 1962 |
| Johnstone | Chas. | (8155/74) Greenstone, Wickepin | 4JO | 1912 |
| Johnstone | Chas. | (8155/74), Greenstone, Wickepin | 4JO | 1924 |
| Johnstone | Edwin | Glenella Farm, Narrogin | EJ8 | 1926 |
| Johnstone | I. D. | Karinya, Mooliabeenie | J3U and 9B, 120E | 1962 |
| Johnstone | I. D. & G. | Nettle Glen, Wickepin | 7GF and 80B, 12A | 1962 |
| Johnstone | J. E. | Blaenavon, York | JJ0 | 1912 |
| Johnstone | J. E. | Blaenavon, York | JJ0 | 1924 |
| Johnstone | Phoebe Jane | Brookland Farm, Narra Tarra | TA4 | 1912 |
| Johnstone | Phoebe Jane | Brookland Farm, Narra Tarra | TA4 | 1924 |
| Johnstone | Robt. | Yalgoo | 6XJ | 1924 |
| Johnstone | Robt. Jas. | Commonage, Yalgoo | N4R | 1924 |
| Johnstone | Wm. R. | Yilgarn Loc. 23, Walgoolan | VX3 | 1924 |
| Johnstone & Son | A. | Benleigh and Murnbi, Mullewa | 5NM and 59F, 5B | 1962 |
| Joice | J. B. | Murray Glen, Pinjarra | J0J and 17C, 71E | 1962 |
| Jokic | J. & M. | Walerene, Toodyay | 2JJ and 116D, 33E | 1962 |
| Joliffe | Albert Ernest | Avoca, Boyup Brook | AJ9 | 1926 |
| Joliffe | Frank Henry | Caledon Farm, Tutunup | U8Q | 1926 |
| Jolley | E. R. | Lot 54, Vict. Loc. 1911, Yandanooka | D5Q | 1924 |
| Jolliffe | F. H. | Vectis Farm, Metricup. via Busselton | U8Q | 1962 |
| Jolly | Albert Ernest | Melrose Street, Leederville | 6QJ | 1924 |
| Jolly | Daniel | Hill View Farm, Yulgering, via Bolgart | Y2J | 1924 |
| Jolly | Edw. W. | Perenjori | 4JX | 1924 |
| Jolly | J. S. & D. E. | Alma Loc. 14171, Nungarin | HJ0 and 24B, 50E | 1962 |
| Jolly | John Herbert | Ribblesdale. Ulakine | XJ4 | 1924 |
| Jolly | Joseph | Avon Loc. 14082, Nungarin | VJ3 | 1924 |
