| Young | J. M. | Moynalty, 1926426, 6696, Boyup Brook | 0JZ and 13B, 35A | 1962 |
| Young | J. O. | Nelson Loc. 2054, Donnelly Road, Manjimup | J0Y | 1926 |
| Young | Jas. | Durham Poultry Farm, Belmont | 6JY | 1924 |
| Young | K. | Glen Arthur, East Beverley | K2Y | 1924 |
| Young | K. L. & I. E. | 5561, 3669, Wubin | 6KY and 31B, 111E | 1962 |
| Young | N. F. | The Patch, Bullfinch | NY1 and 27B, 10A | 1962 |
| Young | P. W. | Grass Valley, Balbarrup | PY1 | 1912 |
| Young | P. W. | Grass Valley, Balbarrup | PY1 | 1924 |
| Young | Percy | Moxorn's Farm, Geraldton | B9Y | 1924 |
| Young | Richard C. | Fitzgerald Locs. 375, 786, Dowak, via Norseman | 8ZX | 1925 |
| Young | Richard W. | Hillside, Kukerin, Wagin | R4Y | 1924 |
| Young | Robt. | Couney's Hills, Via Geraldton | OX3 | 1924 |
| Young | Robt. M. | Marblelup, Young's Siding | RY3 | 1912 |
| Young | Robt. M. | Marbleup, Young's Siding | RY3 | 1924 |
| Young | Sydney | Manjimup | YV1 | 1924 |
| Young | W. | Drover, Onslow | K1Y | 1912 |
| Young | W. | Drover, Onslow | K1Y | 1924 |
| Young | W. | Riverside, Pinjarra | B7U and 51F, 31D | 1962 |
| Young | W. C. | Montrose, Perenjori | 3WY and 36B, 56F | 1962 |
| Young | W. G. | Nelson Loc. 74, 3104, 701, 1134, Manjimup | WY3 and 1C, 16A | 1962 |
| Young | W. H. | Locs. 5896, 3094, 2652, 3388, Young Siding | 2YY and 37B, 37A | 1962 |
| Young | W. M. | Avon Loc. 2, 58-9, 4, Beverley | N9L and 84B, 15E | 1962 |
| Young | W. W. | Fairlands, Woodanilling | WY7 and 17B, 112A | 1962 |
| Young | Walter | Ora Banda Common, Ora Banda | 3PY | 1924 |
| Young | Wm. Juniour | Glenoran Farm, Nungarin | VY8 | 1924 |
| Young | Wm. W. | Marbleup, Young's Siding | 2YY | 1924 |
| Young & Sons | J. T. | Soft Springs, Beverley | OJT and 46D, 110E | 1962 |
| Young Bros. | - | Avoca, East Beverley | YC1 | 1912 |
| Young Bros. | - | Lots 16625, 15905, Kondinin | 9YB | 1924 |
| Young Bros. | - | "Avoca" East Beverley | YC1 | 1924 |
| Young Bros. | - | Beverleigh Brook, Yornaning | YB7 and 26D, 38E | 1962 |
| Young, & Co | D. A. | Rosebank, Gwambygine, via York | JY1 and 80C, 80E | 1962 |
| Young, & Co | F. H. | Loc. 16136, 16142 -3, Kondinin | YA8 and 46D, 113E | 1962 |
| Young, & Co | J. | Poondarra, Kondinin | E1Y and 10D, 36E | 1962 |
| Young, & Co | W.G. | Mandalay, Kondinin | M3V and 19D, 24E | 1962 |
| Yuin Pastoral Co. Pty. Ltd. | - | Yuin Station, Yuin, via Pindar | VT7 and 84C, 14A | 1962 |
| Yundamindera Pastoral Co. Ltd. | - | Yundermindera | 0YU | 1924 |
| Zacher | T. W. | Waterson, Muradup | Z0T and 5B, 8A | 1962 |
| Zadow | P. O. | Graddock, Muradup | X5L and 15C, 20A | 1962 |
| Zadow & Sons | B. A. | Maradup Farm, Muradup | Z3D and 13C, 10A | 1962 |
| Zagami | G. | Mill Site, Wellington Mill | ZG8 | 1962 |
| Zagami | Guiseppe | Mill Site, Wellingtom | ZG8 | 1924 |
| Zaina | James | Yornup, Bridgetown | ZY9 | 1925 |
| Zajac | R. | Lake View, Wannero | 2RZ | 1962 |
| Zaknic | P. | Lot Pt. 1 and Lot 2 of Pt. 1, Bunbury | PZ1 and 38C, 17A | 1962 |
| Zampogna | A. | Wellington 107, Brunswick Junction | 0AZ and 25D, 23E | 1962 |
| Zanet Bros. | - | Yalup Brook Farm, Yalup | ZB6 | 1924 |
| Zani | A. & L. | Sussex 997, Margaret River | 8ZG and 111B, 44A | 1962 |
| Zani | G. | Sondrio Farm, Margaret River | 8ZG | 1924 |
| Zani | P. | Loc. 2154, Margaret River | YQ6 | 1962 |
