| Iles | Wm. Geo. | Commonage, Carnarvon | WG7 | 1912 |
| Iles | Wm. Geo. | Commonage, Carnarvon | WG7 | 1924 |
| Ilesiuha | Chas. | Pt. Hedland and Wodgina via Laverton, Wodgina | CJ3 | 1912 |
| Ilesiuha | Chas. | Port Hedland and Wodgina, via Laverton | CJ3 | 1924 |
| Illidge | Henry | Cameron's Run, Kalamunda | OG1 | 1924 |
| Illingworth | Edwd. P. | Ewlyamartup, via Katanning | 9UX | 1924 |
| Illingworth | Mrs L. | Rose Farm, Bunbury | L0L | 1924 |
| Illingworth | Mrs. L. | Rose Farm, Bunbury | L0L | 1912 |
| Imberti | J. | Kojonup Locs. 4700, 4701, Boscabel, via Kojonup | A7X and 11D, 11E | 1962 |
| Imberti | P. & H. K. | Plant. 3152 and Kojonup 4368-71, 4500, Burakin | K1P and 30B, 71A | 1962 |
| Imms | John Robt. | Ethelglen, Jarnadup | Y9E | 1924 |
| Ince | W. | A.1194, Gairdner River | 1WO and 23E, 80C | 1962 |
| Inchley | William John | Group Loc. 10042, Group 121 Northcliffe | WJ1 | 1926 |
| Indar | Singh | Sunnyside, Hamilton Hill Swamp, Fremantle | SG8 | 1912 |
| Indar Singh | - | Sunnyside, Hamilton Hill Swamp, Fremantle | SG8 | 1924 |
| Ingamells | R. T. | Northcliffe 12215, Manjimup queen-wood, Manjimup | RT0 and 16C, 108A | 1962 |
| Ingebong | T. | Lorna Glen Station, Wiluna | T6Y | 1962 |
| Ingham | T. G. | Skjellinup A.A. 251-5-6, Shackleton | T5G and 20C, 118 E | 1962 |
| Ingle | F. & M. | Ardsley, Carnamuh | FJ1 and 36A, 30B | 1962 |
| Ingleton | B. | Ningham 2964-5, Beacon | 1BB and 20D, 28F | 1962 |
| 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 |
