| Johnston | M. | Common, Nannine | M1J | 1912 |
| Johnston | M. A. I. | Lyndith Farm, Bridgetown | 2VJ | 1924 |
| Johnston | P. H. | Ruby Plains, Kimberley | H1J | 1912 |
| Johnston | P. H. | Kurengut, Nyabing | 6YJ | 1924 |
| Johnston | P. H. | Kojonup Loc. 5966, 6194/5, Nyabing | 6YJ and 33D, 40E | 1962 |
| Johnston | R. | Strathaven, Corrigin | 2RJ and 45A, 6B | 1962 |
| Johnston | R. F. | Juengenup, Bunbury | R9F and 117B, 43A | 1962 |
| Johnston | R. H. | Titicup, Kojonup Loc. 8261, Nyabing | J2Z and 40D, 109E | 1962 |
| Johnston | R. J. | Number 768, Westonia | RJ2 and 33C, 113E | 1962 |
| Johnston | R. P. | Loc. 792, 785, Westonia | RJ4 and 110A, 5B | 1962 |
| Johnston | S. | Ambleside, Armadale | 3FJ and 106E, 7B | 1962 |
| Johnston | S. B. | Glenmore, Dinninup | S0J and 41E, 5D | 1962 |
| Johnston | S. G. | Kniekinboro Dairy, Osborne Park | 7QG | 1924 |
| Johnston | S. G. | 5051, South Stirlings, via Mt. Barker | S6J and 32C, 19A | 1962 |
| Johnston | Sidney H. M. | Coburn Station, Hamelin Pool, via Carnarvon | 7OJ | 1924 |
| Johnston | V. R. | The Cascades, Greenbushes | 6EH | 1924 |
| Johnston | Victor Malcolm | Beulah, Wagin East | V8J | 1924 |
| Johnston | W. | Totadgin, via Merredin | J8U | 1924 |
| Johnston | W. & R. | Avon Loc. 20091, Babakine | ZJ5 | 1924 |
| Johnston | W. B. | Tin Area, Greenbushes | ZJ7 | 1924 |
| 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 |
