| Irvine | W. | Blacksmith | Cue | 1897 | Witton's Directory |
| Irvine | W. | Miner | Golden Valley | 1897 | Witton's Directory |
| Irvine | W. T. | Accountant, Stockbrokers, Office of Westralian Premier Gold Mines, Ltd, Burbank's Birthday Gift Gold Mines, Ltd, Gladiators, Ltd | Coolgardie Chambers, Bayley Street, Coolgardie | 1897 | Witton's Directory |
| Irving | T. | Enginedriver | Karridale | 1897 | Witton's Directory |
| Irwin | Mrs. | Boarding House | Stirling Street, Perth | 1897 | Witton's Directory |
| Irytown | Jos. | Miner | Northampton | 1885 | Herald Almanack |
| Isaacs | Jno | Miner | Nannine | 1897 | Witton's Directory |
| Isaacs | Sam | Teamster | Busselton, Etc. (Augusta, Etc., Karridale, Boranup & Hamlin) | 1889 | WA Almanack |
| Isaacs | Sam. | Teamster | Busselton(Augusta) | 1888 | WA Almanack |
| Isard | George J. | Carriage Examiner | Beverley | 1897 | Witton's Directory |
| Isbeester | S. | Shipwright | Cossack | 1885 | Herald Almanack |
| Isbester | S. | Shipwright | North-West Coast - Roebourne & Cossack | 1877 | Herald Almanack |
| Isbester | S. | Shipwright | North-West Coast - Roebourne & Cossack | 1878 | Herald Almanack |
| Isbester | S. | Shipwright | Cossack | 1879 | Herald Almanack |
| Isbester | S. | Shipwright | North-West Coast (Roeburne & Cossack) | 1879 | WA Almanack |
| Isbester | S. | Shipwright | Canning | 1880 | Herald Almanack |
| Isbester | S. | Shipwright | North-West Coast | 1880 | WA Almanack |
| Isbester | S. | ShipWright | Cossack | 1881 | Herald Almanack |
| Isbester | S. | Shipwright | North-West Coast (Cossack) | 1881 | WA Almanack |
| Isbester | S. | Shipwright | Cossack | 1882 | Herald Almanack |
| Isbester | S. | Shipwright | North-West Coast (Cossack) | 1882 | WA Almanack |
| Isbester | S. | Shipwright | Cossack | 1883 | Herald Almanack |
| Isbester | S. | Shipwright | Cossack | 1884 | Herald Almanack |
| Isbester | S. | Shipwright | North-West Coast (Cossack) | 1884 | WA Almanack |
| Isbester | S. | Shipwright | North-West Coast (Cossack) | 1886 | WA Almanack |
| Isdell | F. | Miner | Nannine | 1897 | Witton's Directory |
| Isles | Miss | Dressmaker | Guildford | 1882 | WA Almanack |
| Isles | Miss | Dressmaker | Guildford | 1883 | WA Almanack |
| Isles | R. | Labourer | Guildford | 1882 | WA Almanack |
| Isles | R. | Labourer | Guildford | 1883 | WA Almanack |
| Israel & Beadell | | Farmers' Home Hotel | Bridgetown | 1897 | Witton's Directory |
| Issott | J. | Storekeeper | Canning | 1882 | WA Almanack |
| Issott | J. | Storekeeper | Canning | 1884 | WA Almanack |
| Issott | J. | Storekeeper | Canning | 1886 | WA Almanack |
| Issott | J. | Storekeeper | Canning | 1887 | WA Almanack |
| Issott | J. | Storekeeper | Canning | 1888 | WA Almanack |
| Issott | J. | Storekeeper | Canning | 1889 | WA Almanack |
| Italian | John | Porter | Perth | 1882 | Herald Almanack |
| Italian | John | Porter | Perth | 1883 | Herald Almanack |
| Italian | John | Porter | Perth | 1884 | Herald Almanack |
| Italian | John | Porter | Perth | 1885 | Herald Almanack |
| Iugleton | A. | Mining Manager | Mines | 1875 | WA Almanack |
| Iverson | P. | | 15 Queen Street, Perth | 1897 | Witton's Directory |
| Ives | Richard | Baker | Fremantle | 1863 | WA Almanack |
| Ives | Richard | Baker | Fremantle | 1864 | WA Almanack |
| Ives | Richard | Baker | Fremantle | 1865 | WA Almanack |
| Ives | Richard | Baker | Fremantle | 1866 | WA Almanack |
| Ives | Richard | Baker | Fremantle | 1867 | WA Almanack |
| Ives | Richard | Baker | Fremantle | 1868 | WA Almanack |
| Ives | W. H. | | "Filey Cottage" Douro Street, Perth | 1897 | Witton's Directory |
