| Knopka | W. F. & R. E. | Lot 204, Kojonup | 8KW and 112B, 104A | 1962 |
| Knott | C. J. | Hillside Farm, Jennacubine | 2KC | 1924 |
| Knott | Jas. | Blocks 20575/55, 20574/55, 4079/68, 10547/74 | 1KS | 1912 |
| Knott | Jas. | Blocks 20575/55, 20574/55, 4079/68, 10547/74 Dumbleyung | 1KS | 1924 |
| Knott | Julia & Robt. J. | Rainbow, Dumbleyung | 2RK | 1912 |
| Knott | Julia & Robt. J. | Rainbow, Dumbleyung | 2RK | 1924 |
| Knott & Co | - | (Butchers), Sandstone | KC7 | 1912 |
| Knott & Co. | - | (Butchers), Sandstone | KC7 | 1924 |
| Knowler | John | Mingenew | J8G | 1925 |
| Knowles | Alfred | Hope Farm, Cuballing | 4KD | 1924 |
| Knowles | Archibald | Meadows, Rockwell, via Geraldton | 9QS | 1924 |
| Knowles | Augusta May | Dorset Downs, Frankland River, Cranbrook | X4S | 1924 |
| Knowles | J. | Blocks 24613/55, 13426/74, Nangeenan | 4KJ | 1912 |
| Knowles | J. | Blocks 24613/55, 13426/74, Nangeenan | 4KJ | 1924 |
| Knowles | J. E. | Yumbellup, Harvey | KJ1 | 1912 |
| Knowles | J. E. | Yambellup, Harvey | KJ1 | 1924 |
| Knowles | N. W. | Red Gum Hills, Kojonup | X4S and 21C, 117E | 1962 |
| Knowles | W. R. | Erigully, Carnarvon | 3ML | 1912 |
| Knowles | W. R. | Erigully, Carnarvon | 3ML | 1924 |
| Knox | G. | Hall's Creek | 9PX | 1928 |
| Knox | G. C. & V. | Salmon Downs Williams Loc. 7943-4, Toolibin | G3K and 49D, 17E | 1962 |
| Knox | John | Rose Valley, East Narrogin | 5KJ | 1924 |
| Knox | L. C. & V. T. | Hay Loc. 2151, Denbarker | 2LK and 8D, 106E | 1962 |
| Knox-Pedan | E. W. De C. | Yarrowoe, Warren River | 0KP | 1912 |
| Knox-Peden | E. W. De C. | Yarrowee, Warren River | 0KP | 1924 |
| Knox-Peden | E. W. DeC. | Yanowee, Nelson 4205-7, Manjimup | 0KP | 1962 |
| Knudson | K. | Emu Park, Boyup Brook | 0GD and 41D, 17E | 1962 |
| Koch | A. D. | Greenacres, Upper Swan | A0K and 48B, 28E | 1962 |
| Kochner | E. A. | Vhlenhurst, Dowerin | 4EK | 1912 |
| Kochner | E. A. | Vhlenhurst, Dowerin | 4EK | 1924 |
| Kogias | N. E. | Nelson Loc. 9069-8, Manjimup | 7MK | 1962 |
| Kohlhagen | C. R. | 2676-7, 2632-3, Busselton | CK7 and 16D, 106E | 1962 |
| Kohlhagen | L. H. & E. | Glen Rock, Cranbrook | LH3 and 15D, 36E | 1962 |
| Kookynie Pastoral Co. Pty. Ltd. | - | Kookynie Station, Kookynie | K08 and 6D, 27E | 1962 |
| Koonmarra Pastoral Co. | - | Koonmarra, Box 5 Meekatharra | UG0 | 1927 |
| Koonmarra Pastoral Co. | - | Koonmarra, Meekatharra | H0S and 4A, 33C | 1962 |
| Koorian Estate | - | Koorian, Gingin | 3HK and 25A, 2C | 1962 |
| Kooshal | - | Commonage, Port Hedland | K3L | 1912 |
| Kooshal | - | Commenage, Port Hedland | K3L | 1924 |
| Kooyong Pastoral Co. | | Koyong, Tenindewa | KP4 and 84C, 31A | 1962 |
| Kopec | J. | Sussex Loc. 3640, Rosa Glen, via Margaret River | K2K | 1962 |
| Kopke | F. A. H. | Yaringa, Wooramel, Via Carnarvon | DH2 | 1924 |
| Kopke | N. E. & M. J. | Yaringa North Station, Carnarvon | DH2 and 33B, 22E | 1962 |
| Korn & Co. | R. B. | Wood Falls, Boyup Brook | 1RK and 19A, 21C | 1962 |
| Korn & Son | G. W. | Forrard Away, Boyup Brook | 4KB and 3B, 39E | 1962 |
| Koseritz | Hans | Strawberry Farm, Mundaring | 2KB | 1912 |
| Koseritz | Hans | Strawberry Farm, Mundaring | 2KB | 1924 |
| Kosick | A. C. | Swan Lot 98, Midland Junction | 5AK and 3D, 27E | 1962 |
| Kosick Bros. | (M. & N. F.) | Swan Loc. 1317, Midland Junction | 7NK | 1962 |
| Kosonen | P. J. | Loc. 1655, Dingup, via Manjimup | OKN and 114B, 110E | 1962 |
