| Yeo | T. & J. | 7750-1, Brookton | TJ4 and 120D, 46E | 1962 |
| Yeoman | Christopher | Avon location 18630, South Kumminin | YO3 | 1924 |
| Yeomans & Son | E. | 18345, 18336, 18338, Narembeen | 9BY and 4D, 33E | 1962 |
| Yeomans Lodge Grazing Co. | - | Park Hills, Boyup Brook | 6GH and 37C, 20A | 1962 |
| Yerilla Pastoral Co. | - | Yerilla Station, Via Kookynie | KY0 | 1924 |
| Yerilla Station | - | Yerella Station, Yerella | OK0 | 1925 |
| Yerilla Station Pty. Ltd. | - | Yerilla Station, Kookynie | 0KO and 4C, 11A | 1962 |
| Yeronga Pty. Ltd. | - | Yeronga, Moora | YP0 and 37D, 40E | 1962 |
| Yewers | Harry Leslie | Mansfield, Merkanooka | LY5 | 1924 |
| Ygoola | - | Ygoola, Kalannie | RH8 and 11C, 56F | 1962 |
| Yiend | W. J. | Avon location 21944, Bendering | Q8V | 1924 |
| Yock | Lunn Mrs C. S. | Evergreen, Toodyay | YL0 | 1924 |
| Yokine Pastoral Co. | - | Minninooka, Geraldton | YOP and 102C, 40A | 1962 |
| Yokine Pastoral Co. Pty. Ltd. | - | Anna Plains, Port Hedland | ZP0 and 4C, 18E | 1962 |
| Yongala Grazing Co. | - | Yongala, Montrose, Hartley, Wannamal | YBG and 3C, 31A | 1962 |
| Yongarloo Farming Co. | - | Yongarloo, Morawa | LY5 and 84C, 29A | 1962 |
| York | Ernest James | Glenfield, Dinninup | EY0 | 1912 |
| York | Ernst. J. | Glenfield, Dinninup | EY0 | 1924 |
| York | F. E. | Raylands, Kwollyinn via Kellerberrin | FY2 | 1912 |
| York | F. E. | Raylands, Kwolyin | FY2 | 1924 |
| York | G. E. | Ingarsby, Wongan Hills | GY4 and 3B, 113E | 1962 |
| York | G. R. | Taupaa, Gingin | Y0K and 13B, 110A | 1962 |
| York | Geo. T. | Carlisle, Watheroo | T1Y | 1924 |
| York | Geo. Thos. | Carlisle, Watheroo | T1Y | 1912 |
| York | H. | Commonage, Roebourne | Y0K | 1912 |
| York | H. | Roebourne | Y0K | 1924 |
| York | Herbert S. | Avon Location 11705-6, North East Tammin | H2Y | 1924 |
| York | L. B. | Creation, Watheroo | LY7 | 1912 |
| York | L. B. | Creaton, Watheroo | LY7 | 1924 |
| York | N. R. | 8699, Coorow | NY7 and 4B, 31A | 1962 |
| York | R. C. & S. J. | Melbourne 3072, 3584, Avon 2494, Wongan Hills | 2WY and 23B, 110E | 1962 |
| York | Thos. | Commonage, Mogumber | 2YT | 1912 |
| York | Thos. | Mogumber | 2YT | 1924 |
| York & Son | C. W. | Valmere, Watheroo | 8CY and 39D, 67E | 1962 |
| York & Son | H. S. | Eboracum, Tammin | H2Y and 10C, 31A | 1962 |
| York & Son | J. M. | Linga-Longa, Watheroo | JY7 and 14B, 14A | 1962 |
| York & Son | W. | Glenview, Watheroo | T1Y and 8B, 113E | 1962 |
| York & Sons | G. H. | Fairfields, Tammin | G1Y and 16C, 40E | 1962 |
| York Municipal Council | - | Public Pound, York | YM0 | 1912 |
| York Municipal Council | - | Public Pound, York | YM0 | 1924 |
| York Municipal Council | - | Public Pound, York | YM0 | 1962 |
| York Pastoral Co. | - | Avon Loc. 10382, Scarborough | YC0 and 6B, 102E | 1962 |
| You | Chang | Commonage, Roebourne | CN6 | 1912 |
| You | Chang | Roebourne | CN6 | 1924 |
| Youangarra Pastoral Co. Pty. Ltd. | - | Youangarra Station., Younami Downs Station Goodlands, Mt. Magnet and Kalannie | X3R and 23B, 29A | 1962 |
| Youd | A. | Tallarook, Muja | T3Y and 24B, 108A | 1962 |
| Young | A. & J. I. | 18759, 16114, Brookton | 8LH and 1C, 36E | 1962 |
| Young | A. C. | Coronation, Brookhampton | A8Y | 1924 |
| Young | A. G. & E. M. | Loc. 7014, 7188, Perenjori | 6AY and 33B, 108E | 1962 |
| Young | A. H. & J. O. | Strathford Farm, Brookton | Y2Y | 1912 |
