| Klause | G. A. | Mt. Tambarin, Bridgetown | GK5 | 1962 |
| Kleeman | H. H. & M. | Tweedview, Boyup Brook | TE7 and 42A, 44B | 1962 |
| Kleesh | J. E. | Commonage, Malcolm | KJ4 | 1912 |
| Kleesh | J. E. | Commonage, Malcolm | KJ4 | 1924 |
| Klein | Albert | Wubin Siding, via Wongan Hills | K2A | 1924 |
| Klein | J. J. | Texas Station, Turkey Creek | V7X | 1962 |
| Klein | W. & E. | Wibin Estate, Nugadong | W0K | 1912 |
| Klein | W. & E. | Wubin Estate, Nugadong | W0K | 1924 |
| Kleinig | M. S. | Ebenzer, Loc. No. 1435, Esperance | 2MK and 103D, 13E | 1962 |
| Klenk | Chas. Christian | Saleyards, Government Abattoirs, North Fremantle | K8C | 1924 |
| Klintworth | John | Woodgenalup, Mt. Barker | 3KJ | 1924 |
| Kloeden | C. F. & B. L. | 1446, Gibson | C7K and 17B, 26E | 1962 |
| Klopper | C. H. | Bridgetown | O3K | 1912 |
| Klopper | C. H. | Bridgetown | O3K | 1924 |
| Klopper | E. C. | C. P. Lease 15514/55, Three Springs | E7K | 1912 |
| Klopper | E. C. | C.P. Lease 15514/55, Three Springs | E7K | 1924 |
| Klopper | H. F. | Careena, Bridgetown | 8OZ | 1924 |
| Klopper | H. R. | Glynden, Greenmount | K1H and 119A, 9B | 1962 |
| Klopper | L. J. | Nelson 810, Bridgetown | K4L and 56F, 17B | 1962 |
| Klopper | L. V. | Homestead, Upper Blackwood | O3K | 1925 |
| Klopper | L. V. | Three Brooks, Winnejup, via Bridgetown | O3K and 19B, 8E | 1962 |
| Klopper & Forrester | - | Highercombe, Gingin | KF1 | 1912 |
| Klopper & Forrester | - | Highercombe, Gingin | KF1 | 1924 |
| Kloss | Fredk. | Homestead,Wagin | FK4 | 1912 |
| Kloss | Fredk. | Homestead, Wagin | FK4 | 1924 |
| Klotzbach | C. H. | Brookleigh, Donnybrook | 4HK | 1912 |
| Klotzbach | C. H. | Brookleigh, Donnybrook | 4HK | 1924 |
| Klowss | A. S. | 1347, Esperance | AK6 and 16B, 42A | 1962 |
| Klug | Est. of H. E. | Koompartoo, Williams | H1K and 40E, 17D | 1962 |
| Klug | Harold Ernest | Koompartoo, Williams | K7V | 1925 |
| Kluth | K. J. | Fairview, Wiluna | K1K and 6E, 37D | 1962 |
| Knapp | B. M. (Mrs) | Allandale, Darkan | K4B and 22D, 108E | 1962 |
| Knapp | D. Henry | Springfield, Torbay | 8DK | 1924 |
| Knapp | E. C. | Hill Grove, Greenough | GK1 | 1912 |
| Knapp | E. C. | Hill Grove, Greenough | GK1 | 1924 |
| Knapp | F. V. | Allandale, Darkan | FK9 and 60F, 10D | 1962 |
| Knapp | Fred T. | C. P. 16170/35. 16254/55, Boyup Brook,Upper Blackwood | FK2 | 1912 |
| Knapp | Fred. T. | C.P. 16170/35, 16254/55, Boyup Brook, Upper Blackwood | FK2 | 1924 |
| Knapp | G. H. | Hillgrove, Greenough | GK3 | 1912 |
| Knapp | G. H. | Hillgrove, Greenough | GK3 | 1924 |
| Knapp | Geo. | Millidu, Ballidu | 4GK | 1924 |
| Knapp | H. E. | Uradale, Boyup Brook | I1K and 10B, 47E | 1962 |
| Knapp | J. W. | Locs. 2130, 2644, Kulja | WK4 and 103A, 10B | 1962 |
| Knapp | Jack & W. | Ballimena, Duli, via Wongan Hills | K4B | 1924 |
| Knapp | James | Woodside, Kronkupp | 1UK | 1912 |
| Knapp | James | Woodside, Kronkupp | 1UK | 1924 |
| Knapp | L. T. | Northlands, Boyup Brook | FK2 and 28B, 31E | 1962 |
| Knapp | R. | The Dell, Ballidu | 6RK and 20B, 47E | 1962 |
| Knapp | R. (jnr) | Bexley Farm, East Ballidu | RK0 and 80A, 18B | 1962 |
| Knapp | R. L. | Westwood Farm, Youngs Siding | R3K and 34C, 38A | 1962 |
