| Udell | W. J. | Nelson Loc. 5486, and 467 and 5487, Manjimup | W2U | 1962 |
| Udgy | Henry | Block 370, Argyle | H1U | 1912 |
| Udy--- | Henry | Block 370, Argyle | H1U | 1924 |
| Ueieh | C. | 11092 Nelson Loc, Nannup | 5CU | 1962 |
| Uffindell & Morrish | - | Locs. 3478-83, Woolundra | 7VA | 1924 |
| Uglow | A. R. & G. | 3879, 3935, 8763, Morawa | A2U and 52F, 104B | 1962 |
| Uhe | F. L. | Glenera, Goomalling | FU3 | 1912 |
| Uhe | F. L. | Glenera, Goomalling | FU3 | 1924 |
| Uhr | L. K. sen. | Wombiana, Kojonup | LU4 | 1924 |
| Ulbrich | C. F. & M. | Kiearra, West Pingelly | C1U and 2C, 116E | 1962 |
| Ulbrich | L. D. | Carramar, Kelmscott | L1U and 84D, 108E | 1962 |
| Ulbrich | R. D. | Long Acers, Brookton | R1U and 32B, 4A | 1962 |
| Ullinger & Sons | - | Rossmore, Goomalling | CY6 and 27B, 19A | 1962 |
| 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 |
