| Kosta | G. | Allendale, Williams | 5GK and 67E, 9D | 1962 |
| Kostanich | Nicholas | Commonage, Meekatharra | X7K | 1924 |
| Koster | Johana L. | Hollandia, Pemberton | LK9 | 1927 |
| Koster | W. | Pleasant View, Ryans Brook, via Kojonup | 1WK and 80D, 18E | 1962 |
| Kotsicos | M. | Dundangin Farm, Mukinbudin | M2K and 34D, 120E | 1962 |
| Kowald | A. W. | The Grange Riverdale and Highlands, Katanning | WK8 and 5B, 17E | 1962 |
| Kowald | C. R. | Crystal Brook and Loc. 7089, Katanning and Beaufort River | C7K and 52F, 84B | 1962 |
| Kowald | E. L. | Sunny View, Katanning | K1E and 10A, 20B | 1962 |
| Kowald | E. P. | Block No. 355-6, 1729, 1742, Katanning | EK2 and 14B, 26E | 1962 |
| Kowald | F. E. | Kooringa, Katanning | 7CL and 80C, 10A | 1962 |
| Kowald | F. O. | Homeside, Katanning | F0K and 47E, 29D | 1962 |
| Kowald | Fred W. | The Grange, Katanning | WK8 | 1912 |
| Kowald | Fred W. | The Grange, Katanning | WK8 | 1924 |
| Kowald | G. O. | Mugga Wagga, Victoria Loc. 7141, 7476, 7140, 1527, 8941, 8129, 8128, Canna | G9K and 112D, 15E | 1962 |
| Kowald | G. W. R. | Malvern Hill, Katanning | K0R | 1912 |
| Kowald | G. W. R. | Malvan Hill, Katanning | K0R | 1924 |
| Kowald | G. W. R. | Malvern Hill, Katanning | K0R and 41B, 48A | 1962 |
| Kowald | H. A. | Eulymartup Farm, Katanning | 3KA | 1924 |
| Kowald | H. A. | H.F. 16949/74, Katanning | LK8 | 1924 |
| Kowald | I. L. | Williams Loc. 995, 996, 998, Pt. 45, 12301, 3, 27, 770, Katanning | 0LK and 12E, 47B | 1962 |
| Kowald | L. W. | Woodlands, Katanning | LK1 and 48A, 18B | 1962 |
| Kowald | M. R. | Birdwood, Cheery Tree Pool | M1K and 107A, 36B | 1962 |
| Kowald | N. E. | Capemont, Katanning | N4K and 50C, 108E | 1962 |
| Kowald | R. J. | Pindawa, Canna | JK7 and 7A, 33C | 1962 |
| Kowald | R. P. | Jam Hills, Katanning | 3PK and 10B, 45E | 1962 |
| Krakouer | Alfred | Ryan's Brook, Cranbrook | A6K | 1924 |
| Krakouer | D. | Water Dale, Kojonup | DK2 | 1912 |
| Krakouer | D. | Water Dale, Kojonup | DK2 | 1924 |
| Krakouer | Raphael | Kojonup, Kojonup | RK2 | 1912 |
| Krakouer | Raphael | Kojonup | EK8 | 1924 |
| Kramer | E. H. | Merkanooka, Via Mingenew | EK8 | 1924 |
| Kramer | H. W. | Oak-bank, Wagin | 1HK | 1912 |
| Kramer | H. W. | Oakbank, Wagin | 1HK | 1924 |
| Krapljanov | B. | Nelson 866, Bridgetown | 9BK and 21B, 117E | 1962 |
| 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 |
