| Knight & Son | - | Knightsbrook, Argyle | K9S | 1924 |
| Knight & Son | - | Victoria Loc. 3930, Koolanooka | KB9 and 119D, 7E | 1962 |
| Knight Bros. | - | Victoria Location 3930, Koolanooka | KB9 | 1924 |
| Knight Bros. | - | Korijalap Lot 57, 99-100-1, 93-4, Harvey | ZY8 and 21D, 24E | 1962 |
| Knights | A. E. | Hamlin Pool | A5K | 1912 |
| Knights | A. E. | Hamelin Pool | A5K | 1924 |
| Knights | F. | Braeside, Brunswick Junction | K6F | 1924 |
| Knipe | S. | Shenton Street, Menzies | Z3K | 1924 |
| Knipe | S. W. | Flamingo, Spencers Brook | Z3K and 47D, 32E | 1962 |
| Knipe & Son | S. W. | Flamingo, Spencers Brook | 0Y7 and 40B, 37A | 1962 |
| Kniveton | G. | The Hillocks, Witchcliffe | GK6 | 1962 |
| Kniveton | G. F. | Dale-Lands, Margaret River | GK7 and 102D, 48E | 1962 |
| Kniveton | G. F. | Crescent View, Witchcliffe | OGK and 43C, 80E | 1962 |
| Kniveton | W. L. | The Hillocks, Witchcliffe | LK6 | 1962 |
| Knock | L. J. | Lot 15 part of 154, Jandakot | 4LK | 1962 |
| Knoop | Chas. | Sandlewood Farm, Nyabing | ZK0 | 1924 |
| 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 |
