| Kratochvill & Sons | J. | Plantagenet Loc. 401, Albany | 7KS and 33C, 18E | 1962 |
| Kregor | John | Zeehan Farm, Kondut | ZK3 | 1924 |
| Kreiling | Mrs M. | Hillside Farm, Amphion | EQ4 | 1924 |
| Kreins | Harry | Stone Hill, Preston, Donnybrook | KH8 | 1924 |
| Kretschmer | D. A. | 1209 (Farm 42), Gairdner River | D5K and 19C, 48E | 1962 |
| Krieg | H. J. & M. | Rosscomon, Ballidu | HK3 and 49C, 29E | 1962 |
| Kristoffersen | K. | Undin, Goomalling | KK9 | 1912 |
| Kristoffersen | K. | Undin, Goomalling | KK9 | 1924 |
| Kroehn | L. S. & S. M. | Desbrook, Hines Hill | 4SK and 105B, 31A | 1962 |
| Kroenert | C. A. | Armadale | CK4 | 1912 |
| Kroenert | C. A. | Armadale | CK4 | 1924 |
| Kroenert | P. A. J. | Block 1464, Nungarin | 4AK | 1912 |
| Kroenert | P. A. J. | Block 1464, Nungarin | 4AK | 1924 |
| Krogdahl | M. L. | Sunshine Hill, Pingrup | M7K and 30A, 18B | 1962 |
| Krug | Conrad | Commonage, Quinn's via Nanine | CK5 | 1912 |
| Krug | Conrad | Commonage Quinn's, Via Nannine | CK5 | 1924 |
| Krug | Ernest E. | Davidston, Moora | 1DK | 1912 |
| Krug | Ernest E. | Davidston, Moora | 1DK | 1924 |
| Kruger | C. E. | Turville, Wagin | C3K | 1912 |
| Kruger | C. E. | Turville, Wagin | C3K | 1924 |
| Kruger | C. E. | Camden 79 and 199, Pinjarra | C3K | 1962 |
| Kruger | F. W. | Atherhagen, Wagin | K1A | 1912 |
| Kruger | F. W. | Atherhagen, Wagin | K1A | 1924 |
| Kruger | Max. | Booralaming, Lake Brown | QK4 | 1924 |
| Kruger | R. | Bushland, Ghooli | CG1 and 39C, 26A | 1962 |
| Kruger | W. C. | Commonage, Roebourne | WK4 | 1912 |
| Kruger | W. C. | Commonage, Roebourne | WK4 | 1924 |
| Krummel & Son | - | Kanyanya, Morawa | K1B and 37D, 20E | 1962 |
| Kruse & co. | - | Mundijong | K0B | 1927 |
| Kubach | U. | Nelson 9890-97-98, Northcliffe | ZA7 | 1962 |
| Kubank | N. F. | Clover Bank, Kendenup | 0NK and 103B, 47A | 1962 |
| Kuch | H. | 6208, Borden | 2HK and 32B, 28E | 1962 |
| Kuhl | F. | Roe Loc. 964, 1488, Newdegate | 4FK and 23D, 115E | 1962 |
| Kuhl | F. G. | W.S.L.S. A. 318E, York | 7FK and 47A, 27B | 1962 |
| Kuhl | W. | Collicup Hill, Upper Blackwood | WK7 | 1912 |
| Kuhl | W. | Collicup Hill, Upper Blackwood | WK7 | 1924 |
| Kuhlmann | Hermann Robt. | Moorlands Farm, Ravensthorpe | KU2 | 1924 |
| Kuhne | B. & M. | Victoria Loc. 8511, 9306, Caron | K1K and 32D, 104E | 1962 |
| Kuig | Albert | Glenelg, Gabbin | A2K | 1926 |
| Kulit | A. | 375 and 1103, Warralakin | 7AK and 48B, 33E | 1962 |
| Kumas | Kahn | Commonage, Meekatharra | KQ5 | 1924 |
| Kunicic | Jack | Byford | JK1 | 1926 |
| Kupsch | C. F. | Loc. 2988, Nabawa | AK5 and 47B, 40E | 1962 |
| Kupsch | H. & A. R. | 2284 and Part 3524, Norther Gully, via Geraldton | 9IK and 42C, 46A | 1962 |
| Kupsch | W. R. | 3524, Northern Gully via Geraldton | 3NK and 16C, 107E | 1962 |
| Kupsch Bros. | - | Northern Gully Siding | 3NK | 1924 |
| Kupsch Bros. | - | Water Gully, Nabawa | K6B and 48B, 120E | 1962 |
| Kuser | T. & M. | Battle-Ho, Bencubbin | T7K and 22B, 42E | 1962 |
| Kuser | W. F. | Commonage, Bayswater | 5ZD | 1924 |
| Kushi | Ram | Mount Magnet | K6P | 1912 |
