| Ullrich | A. H. & G. E. | Rivervale, Mullewa | U1N and 17B, 49E | 1962 |
| Ullrich | L. A. | 2924, 2029, Mullewa | 0LT and 10D, 15E | 1962 |
| Ullrich Estate | J. W. H. | Inverness, Coorow | P3F and 112D, 8E | 1962 |
| Ullwarra Pty. Ltd | - | Ullawarra Station, Carnarvon | JM7 and 84C, 12A | 1962 |
| Ullyott | John F. | Bendering, Bendering | U4J | 1924 |
| Ullyott | Wm. L. | Redmine, Kurrenkutten | 4LU | 1924 |
| Underdown | L. | Kuranda, Wagin | 2LU and 38D, 116E | 1962 |
| Underdown | T. W. | Plantagenet, 4638, Albany | TU4 and 28B, 107E | 1962 |
| Underdown | Thos. E. | Forrest View, Beverley | 1TU | 1912 |
| Underdown | Thos. E. | Forrest View, Beverley | 1TU | 1924 |
| Underhill | D. H. | Jarrah Glen L.N 10215, Walpole | ZH2 | 1962 |
| Underwood | Jas. | Hilcrest, Coorow | 6UX | 1924 |
| Underwood | L. | Arthurfield, Brookton West | 7UA | 1924 |
| Underwood | L. A. | Dallwood Farm, Tammin | L0U and 42B, 40E | 1962 |
| Underwood | W. H. | Beatinni, Geraldton | U7Q | 1924 |
| Underwood & Reitch | - | Cleveland Vale, Mocardy, Goomalling | UR5 | 1912 |
| Underwood & Reitch | - | Cleveland Vale, Mocardy, Goomalling | UR5 | 1924 |
| Underwood & Sons | L. C. B | Nautawarra, Dowerin | B3U and 50C, 28E | 1962 |
| United Aborigines Mission | - | Cosmo Newbery, Dowerin | UM2 and 6D, 20E | 1962 |
| United Aborigines Mission | - | Warburton Range, via Laverton | UM3 and 29B, 28A | 1962 |
| University of Western Australia | - | University Grounds, Nedlands | UN1 and 120D, 8E | 1962 |
| Unmack | T. A. | Swan 1611 Ptn. 1743, 2097-8, Wooroloo | T1U and 45C, 53F | 1962 |
| Unstead | Alfred | Sunnyside, Upper Blackwood, via Bridgetown | A3U | 1924 |
| Unstead | C. A. | Present Park, Boyup Brook | C3U and 28B, 49A | 1962 |
| Unstead & Sons | W. K. | Horseshoe Bend, Boyup Brook | W4U and 49C, 36E | 1962 |
| Upham | Arthur | Brooklands, Harvey | 3UA | 1924 |
| Uphill & Meares | - | Inverness, Greenbushes | D2U | 1924 |
| Upjohn & Sons | E. A. | Clydendale Farm, Baandee | 4EA | 1912 |
| Upjohn & Sons | E. A. | Clynedale Farm, Baandee | 4EA | 1924 |
| Uppill | George | Tammin | GU1 | 1912 |
| Uppill | George | Tammin | GU1 | 1924 |
| Uppill & Co. | A. R. | Coodernuppin, Tammin | GU1 and 116B, 3E | 1962 |
| Upson | E. R. | Kalgan river | E6U | 1924 |
| Upson | R. E. & E. D. | Upson Downs, Capel | E6U and 110B, 10E | 1962 |
| Upton | A. W. | Carinya, Borden | AU3 and 20B, 112A | 1962 |
| Upton | W. K. | Lot 5, Brunswick Junet | W4U and 103B, 23E | 1962 |
| Upton & Sons | A. | Hardwick, Cookernup | UA0 | 1962 |
| Uranbah Estate | - | Uranbah, Tambellup | L2W and 112B, 14A | 1962 |
| Uraoo Pastoral Co. Ltd. | - | Uaroo Station, Onslow | UR0 and 10C, 5E | 1962 |
| Urawa Ltd. | - | Urawa Station, Mullewa | U2O and 116B, 18A | 1962 |
| Urch | A. J. | Somerset Farm, Geraldton | J9U | 1912 |
| Urch | A. J. | Somerset Farm, Geraldton | J9U | 1924 |
| Ure Bros. | - | Churinga Ninghan 3276-7, Dalwallinu | 1UB and 22C, 84A | 1962 |
| Uren | A. C. & P. J. | Hillside, Babakin | UA0 and 22C, 50E | 1962 |
| Uren | E. A. | Oakdale Farm, Popanyinning | E8U | 1912 |
| Uren | E. A. | Oakdale Farm, Poanyinning | E8U | 1924 |
| Uren | Fredk. | Mt. Myrniong, Armadale | FU2 | 1924 |
| Uren | John G. | Kiro Dairy, Osborne Park | JU1 | 1927 |
| Urquhart | D. | Braemar, Wagin | 1DU and 16B, 26E | 1962 |
| Urquhart | Donald | Braemar, c/o. P. J. Toll, Jaloran, Wagin | 1DU | 1928 |
