| 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 |
| Ivory | John | Golden West Aerated Cordial Factory | Lindsay Street, Coolgardie | 1897 | Witton's Directory |
| Ivory Bros | | Wholesale & Retail Tobacconists & Hairdressers | Bayley Street, Coolgardie | 1897 | Witton's Directory |
| Ivory Bros | | Hairdressers & Tobacconists | Ford Street, Coolgardie | 1897 | Witton's Directory |
| Ivoy | John | | York | 1897 | Witton's Directory |
| Ivoy | R. | | York | 1897 | Witton's Directory |
| Izard | W | - | Perth | 1878 | Herald Almanack |
| Izard | W. | - | Perth | 1879 | Herald Almanack |
| Izard | W. | - | Perth | 1879 | WA Almanack |
| Izard | W. | - | Perth | 1880 | Herald Almanack |
| Izard | W. | - | Perth | 1880 | WA Almanack |
| Izard | W. | - | Perth | 1881 | Herald Almanack |
| Izard | W. | - | Perth | 1881 | WA Almanack |
| Izard | W. | Billiard-Marker | Perth | 1882 | WA Almanack |
| Izard | W. | Billiard- Marker | Perth | 1884 | WA Almanack |
| Izard | W. | - | Perth | 1886 | WA Almanack |
| Izard | William | - | Perth | 1877 | WA Almanack |
| Izard | Wm. | - | Perth | 1884 | Herald Almanack |
| Izard | Wm. | - | Perth | 1885 | Herald Almanack |
| Izard & Witham | | Mining Agents | Toorak (suburb), Coolgardie | 1897 | Witton's Directory |
| Jaboeson | M. | | 24 Mill Street, Perth | 1897 | Witton's Directory |
| Jackaman | J. & W. | Saddlers | Adelaide Terrace, Perth | 1873 | Herald Almanack |
| Jackaman | J. & W. | Saddlers | Perth | 1874 | WA Almanack |
| Jackaman | Mrs. | Midwife | Perth | 1876 | WA Almanack |
| Jackaman | W. | Ostler | Perth | 1884 | WA Almanack |
| Jackman | Mrs. | Midwife | Perth | 1877 | WA Almanack |
| Jackman | Walter | - | Perth | 1884 | Herald Almanack |
| Jackman | Walter | - | Perth | 1885 | Herald Almanack |
| Jackman | Walter | - | Perth | 1886 | WA Almanack |
| Jackman | Walter | Barman | Perth | 1889 | WA Almanack |
| Jackon | Thomas | Farmer | Wellington District (Bunbury, Etc) | 1880 | WA Almanack |
| Jackson | A. | Labourer | Fremantle | 1884 | WA Almanack |