| Cookworthy | Miss | Farmer | Busselton & Sussex District | 1867 | WA Almanack |
| Cookworthy | Miss | - | Busselton & Sussex District | 1869 | WA Almanack |
| Cookworthy | Miss | - | Busselton & Sussex District | 1870 | WA Almanack |
| Cookworthy | Miss | - | Busselton & Vasse | 1872 | WA Almanack |
| Cookworthy | Miss | - | Vasse & Busselton | 1873 | WA Almanack |
| Cookworthy | Miss | - | Busselton, Sussex & Nelson | 1874 | Herald Almanack |
| Cookworthy | Miss. | - | Busselton | 1873 | Herald Almanack |
| Coolgardie Coffee Palace | Wilson, Mrs. | Proprietor | 52 Murray Street, Perth | 1897 | Witton's Directory |
| Coolgardie Land & Agency Co | | Sharebrokers, Mining & Commission Agents | Chancery Chambers, Hunt Street, Coolgardie | 1897 | Witton's Directory |
| Coolgardie Promt Printery | | Mott, H. C. & Co, Proprietors | Bayley Street, Coolgardie | 1897 | Witton's Directory |
| Coolgardie Steam | | Sawmill Offices | Victoria Buildings, Bayley Street, Coolgardie | 1897 | Witton's Directory |
| Coombe | Ernest | | Northam | 1897 | Witton's Directory |
| Coombe | James & Co. | Timber Yard | Egan Street, Kalgoorlie | 1897 | Witton's Directory |
| Coombe | T. | | Brown Street, Perth | 1897 | Witton's Directory |
| Coombe | T. | Timber & Iron Merchants | Lord Street, Perth | 1897 | Witton's Directory |
| Coomber | F. | | Hardinge Street, Perth | 1897 | Witton's Directory |
| Coomber | G. | Civil Engineer | 8-11 Kalgoorlie Exchange Buildings, Hannan Street, Kalgoorlie | 1897 | Witton's Directory |
| Coomber & Sage | | Grocers | Hardinge Street, Perth | 1897 | Witton's Directory |
| Coomber & Sage | Coomber F. & Sage E. | Grocers | Barrack Street, Perth | 1897 | Witton's Directory |
| Coombes | A. | Store Assistant | Bunbury | 1897 | Witton's Directory |
| Coombes | Alf. | | Stewart Street, Fremantle | 1897 | Witton's Directory |
| Coombes | J. C. | | Bunbury | 1897 | Witton's Directory |
| Coombes | Mrs | | Bunbury | 1897 | Witton's Directory |
| Coombs | E. | | Cecil Street, Perth | 1897 | Witton's Directory |
| Coombs | T. | Carter | Perth | 1873 | WA Almanack |
| Coombs | T. | Carter | Perth | 1874 | WA Almanack |
| Coombs | Thos. | Carter | Perth | 1872 | WA Almanack |
| Coombs | W. | Carter | Beaufort Street, Perth | 1873 | Herald Almanack |
| Coombs | W. | Carter | Perth | 1874 | Herald Almanack |
| Coombs | W. | Shingle Splitter | Perth | 1874 | WA Almanack |
| Coombs | W. | Carter | Perth | 1875 | Herald Almanack |
| Coombs | W. | Carter | Perth | 1875 | WA Almanack |
| Coombs | W. | Carter | Perth | 1876 | Herald Almanack |
| Coombs | W. | Carter | Perth | 1876 | WA Almanack |
| Coombs | W. | Carter | Perth | 1877 | Herald Almanack |
| Coombs | W. | Carter | Perth | 1877 | WA Almanack |
| Coombs | W. | Carter | Perth | 1878 | Herald Almanack |
| Coombs | W. | Carter | Perth | 1879 | Herald Almanack |
| Coombs | W. | Carter | Perth | 1879 | WA Almanack |
| Coombs | W. | Carter | Perth | 1880 | Herald Almanack |
| Coombs | W. | Carter | Perth | 1880 | WA Almanack |
| Coombs | W. | Carter | Perth | 1881 | Herald Almanack |
| Coombs | W. | Carter | Perth | 1881 | WA Almanack |
| Coombs | W. | Carter | Perth | 1882 | WA Almanack |
| Coombs | W. | Carter | Perth | 1884 | WA Almanack |
| Coombs | W. | | Fitzgerald Street, Perth | 1897 | Witton's Directory |
| Coomer | M. | Bootmaker | Perth | 1884 | Herald Almanack |
| Coomer | Michael | | Northam | 1897 | Witton's Directory |
| Coonan | M. | Farmer | Bunbury (Dardanup & Upper Ferguson) | 1877 | WA Almanack |
| Coonan | M. | Farmer | Wellington District (Dardanup & Upper Ferguson) | 1879 | WA Almanack |