| Illingworth | Fredk. | M.L.A, Land Agent | Saint George's Terrace, Perth | 1897 | Witton's Directory |
| Illsley | Geo. | Carpenter | Guildford | 1897 | Witton's Directory |
| Imperial Fire Insurance Co. | Smith, C. H. | Manager | Ground Floor, 53 Carnarvon Chambers, William Street, Perth | 1897 | Witton's Directory |
| Imperial Restaurant (G. Lovett, Proprietor) | | | Hannan Street, Kalgoorlie | 1897 | Witton's Directory |
| Imray | F. J. | Tobacconist; Bandmaster F.N.A. Vols. | Fremantle | 1887 | WA Almanack |
| Imray | F. J. | Bandmaster Naval Artill | Fremantle | 1888 | WA Almanack |
| Imray | F. J. | Bandmaster Naval Artily | Fremantle | 1889 | WA Almanack |
| Imray | F. J. | Barber & Stationer | John Street, North Fremantle | 1897 | Witton's Directory |
| Imray | Mrs | Boarding House Keeper | Parker's Range | 1897 | Witton's Directory |
| Ince | J. | Stationer and Fancy Goods | Albany | 1888 | WA Almanack |
| Ince | J. | Stationer and Fancy Goods | Albany | 1889 | WA Almanack |
| Ince | J. M. | Stationer | Albany | 1887 | WA Almanack |
| Indian Laundry | | | Murray Street, Perth | 1897 | Witton's Directory |
| Industrial School | Fowler, F. J. | Superintendent | Trafalgar Road, Perth | 1897 | Witton's Directory |
| Ines | F. | Farmer | Wattoning | 1897 | Witton's Directory |
| Ing | A. G. | General Agent | Hampton Road, Fremantle | 1897 | Witton's Directory |
| Ing | A. G. | Grocer | Hampton Road, Beaconsfield | 1897 | Witton's Directory |
| Ing | Mrs. L. | Storekeeper | Hampton Road, Fremantle | 1897 | Witton's Directory |
| Ing | S. G. | Jeweller | York | 1897 | Witton's Directory |
| Ing | W. H.. | Engine Driver | Day Dawn | 1897 | Witton's Directory |
| Ingles | James | | Northam | 1897 | Witton's Directory |
| Ingleton | A | Mining Manager | Northampton | 1879 | WA Almanack |
| Ingleton | A. | Mining Manager | Mines | 1875 | Herald Almanack |
| Ingleton | A. | Mining Manager | Mines | 1876 | Herald Almanack |
| Ingleton | A. | Mining Manager | Victoria District (Mines & Northampton) | 1876 | WA Almanack |
| Ingleton | A. | Mining Manager | Northampton | 1877 | Herald Almanack |
| Ingleton | A. | Mining Manager | Victoria District (Northampton) | 1877 | WA Almanack |
| Ingleton | A. | Mining Mananger | Northampton | 1878 | Herald Almanack |
| Ingleton | A. | Mining Manager | Northampton | 1879 | Herald Almanack |
| Ingleton | A. | Mining Manager | Northampton | 1880 | Herald Almanack |
| Ingleton | A. | Mining Manager | Victoria District (Northampton) | 1880 | WA Almanack |
| Ingleton | A. | Mining Manager | Northampton | 1881 | Herald Almanack |
| Ingleton | A. | Mining Manager | Victoria District (Northampton) | 1881 | WA Almanack |
| Ingleton | D. | Narra Tarra Mine Manager | Victoria District (Northampton) | 1884 | WA Almanack |
| Ingleton | D. C. | Warder | Geraldton | 1897 | Witton's Directory |
| Ingleton & Co | Geo. | Merchants | Perth | 1879 | WA Almanack |
| Ingleton & Co. | Geo. | Merchants | Perth | 1875 | Herald Almanack |
| Ingleton & Co. | Geo. | Merchants | Perth | 1875 | WA Almanack |
| Ingleton & Co. | Geo. | Merchants | Perth | 1877 | Herald Almanack |
| Ingleton & Co. | Geo. | Merchants | Perth | 1877 | WA Almanack |
| Ingleton & Co. | Geo. | Merchants | Perth | 1878 | Herald Almanack |
| Ingleton & Co. | Geo. | Merchants | Perth | 1879 | Herald Almanack |
| Ingleton & Co. | Geo. | Merchants | Perth | 1880 | Herald Almanack |
| Ingleton & Co. | Geo. | Merchants | Perth | 1880 | WA Almanack |
| Ingleton Geo. & Co. | | Merchants | Perth | 1876 | WA Almanack |
| Ingleton?& Co. | Geo. | Merchants | Perth | 1876 | Herald Almanack |
| Inglis | Jas. | Storekeeper | Bridgetown | 1897 | Witton's Directory |
| Inglis | Jas. | Hotelkeeper | Geraldton | 1897 | Witton's Directory |
| Inglis | S. | Clerk | Geraldton | 1897 | Witton's Directory |
| Ingoldby | - | Dr. | Fremantle | 1886 | WA Almanack |
