| Inglewood Pastoral Co. | - | Dorset Downs, Frankland | D1D and 52F,10B | 1962 |
| Inglis | C. | 5506 and 5842, Albany | 7CT and 5B, 7E | 1962 |
| Inglis | D. J. | Dylongup, Boyup Brook | DJ9 and 34B, 44E | 1962 |
| Inglis | H. J. | Ingledowns, Eneabba, Three Springs | H1Z and 49C, 38A | 1962 |
| Inglis | James | Bonafield, Bridgetown | OK7 | 1912 |
| Inglis | James | Bonafield, Bridgetown | OK7 | 1924 |
| Inglis | L. C. | Melbourne 93, 31741965-6, Mogumber | LC3 and 112A, 13B | 1962 |
| Inglis | Thos. E. | Kojonup | TE7 | 1912 |
| Inglis | Thos. E. | Kojonup | TE7 | 1924 |
| Inglis | W. C. | Bondfield, Boyup Brook | 0K7 and 14C, 22E | 1962 |
| Inglis | W. E. | Nelson Locs. 1926 and 2936, Boyup Brook | 4NP | 1924 |
| Inglis | W. E. | Roxburgh, Bouyup Brook | UE9 and 28A, 1C | 1962 |
| Inglis | W. W. | 365, 136, 364, Serpentine | 7WW and 23B, 39E | 1962 |
| Inglis | Wm. E. | Roxburgh, Boyup Brook | UE9 | 1924 |
| Ingram | C. C. | Ingleside, Greenbushes | O4H and 37C, 29E | 1962 |
| Ingram | H. | Hurtle Vale Farm, East Narrogin | H7N | 1912 |
| Ingram | J. R. | Reynella, Narrogin | JR1 | 1912 |
| Ingram | J. R. | Reynella, Narrogin | JR1 | 1924 |
| Ingram | P. R. | Sewell's Rock, Yealering | P6Z | 1924 |
| Ingram | S. S. | Mead Brook Farm, Narrogin | 1SQ | 1924 |
| Ingram | S. S. & D. S. | Tourello, Yealering | 1SQ and 41E, 39B | 1962 |
| Ingram | Thos. | Denton, Pingelly | TP9 | 1912 |
| Ingram | Thos. | Denton, Pingelly | TP9 | 1924 |
| Ingram | Walter | Glen Albyn, Narrogin | W1O | 1912 |
| Ingram | Walter | Glen Albyn, Narrogin | W1O | 1924 |
| Ingrarson | J. E. V. K. | Cockburn Sound, Lot 2, Bibra Lake | EV8 | 1924 |
| Inkpen | Geo. E. | York | G1Y | 1924 |
| Inkpen | George E. | York, York | G1Y | 1912 |
| Inman | E. S. | Dukin, via Dowerin | 2MV | 1924 |
| Inman | G. W. | Avon 17069, 12394, 12393, 17068, 26089, 56/80, Koorda | GM1 and 48A, 6C | 1962 |
| Inman | George Walker | Romali, Dukin | GM1 | 1926 |
| Innes | A. J. | W.S.L.S. A.1153, Denbarker | AJ9 and 17B, 49A | 1962 |
| Innes | A. J. | Hawkhurst, Kendenup | ZW9 | 1962 |
| Innes | K. E. | Victoria Loc. 5671, Latham | KE1 and 48B, 43E | 1962 |
| Innes | W. V. (Mrs) | Ulichatopping, Doodlakine | WV0 and 38A, 44B | 1962 |
| Innocent | D. G. | 31-2 Pingelly | 6DD and 20B, 20A | 1962 |
| Innocent | T. W. | Barsrettop Bunjil | TW7 and 11B, 105A | 1962 |
| Innouendy Pastoral Co. | - | Innouendy Station, Cue | 1DD and 12B, 13A | 1962 |
| Innouendy Pastoral Co. | - | Past Lease 394/521, Cue | 7DD and 28C, 5A | 1962 |
| Innouindy Pastoral Co. Ltd. | - | Innouindy Station, Yalgoo | 1DD | 1924 |
| Inverarity | D. H. | Dinirimup, Kellerberrin | 1ND | 1912 |
| Inverarity | D. H. | Dinirimup, Kellerberrin | 1ND | 1924 |
| Inverarity | R. M. | Booyah Park, Kellerberrin | 1ND and 6D, 33E | 1962 |
| Inverarity Rodier & Peacock | - | Pintherka Well, North Morowa via Mingenew | 6RP | 1912 |
| Inverarity, Rodier & Peacock | - | Pintherka Well, North Morowa, via Mingenew | 6RP | 1924 |
| Inwood | William Thomas | Block 484, Kendenup | 1NW | 1926 |
| Ion | H. J. | Ten-En, Victoria 10254, Eneabba, via Three Springs | 1ON and 42E, 1C | 1962 |
| Ions | Mark | Fitzgerald Loc. 1022, Dowak via Norseman | MD1 | 1927 |
| Ipsen | J. S. | Mayfield, Balbarrup | JZ3 | 1912 |
| Ipsen | J. S. | Mayfield, Balbarrup | JZ3 | 1924 |
