| Cotton | Jas | Farmer | Wellington District (Brunswick Collie Harvey & Perth Road) | 1879 | WA Almanack |
| Cotton | Jas. | Farmer | Bunbury (Brunswick, Collie, Harvey & Perth Road) | 1877 | WA Almanack |
| Cotton | W. T. | | Cottesloe | 1897 | Witton's Directory |
| Cottrell | J. | | Smiths's Mill | 1897 | Witton's Directory |
| Cottrell | R. | | Hardinge Street, Perth | 1897 | Witton's Directory |
| Cottrell | R. | Produce Merchant | 91 Murray Street, Perth | 1897 | Witton's Directory |
| Cottrell | T. | | Palmerston Street, Perth | 1897 | Witton's Directory |
| Cottrell | T. L. | Coach & Buggy Builder | 85 Murray Street, Perth | 1897 | Witton's Directory |
| Couch | J. | | 6 Melbourne Road, Perth | 1897 | Witton's Directory |
| Couch | J. | Miner | Garden Gully, Nannine | 1897 | Witton's Directory |
| Coucher | G. | Farmer | Murray | 1868 | WA Almanack |
| Coucher | G. | Farmer | Murray | 1869 | WA Almanack |
| Coucher | G. | Farmer | Murray | 1870 | WA Almanack |
| Coucher | G. | Farmer | Murray & Serpentine | 1872 | WA Almanack |
| Coucher | G. | Farmer | Murray | 1873 | Herald Almanack |
| Coucher | G. | Farmer | Murray | 1874 | Herald Almanack |
| Coucher | G. | Farmer | Murray & Serpentine | 1874 | WA Almanack |
| Coucher | G. | Farmer | Murray & Serpentine | 1876 | WA Almanack |
| Coucher | G. | Farmer | Murray & Serpentine | 1877 | WA Almanack |
| Coucher | H. T. | Farmer | Daylerking | 1897 | Witton's Directory |
| Couderot | C. | Mgr. Salt Works (Rottnest) | Fremantle | 1888 | WA Almanack |
| Couderot | C. | Mgr. Salt Works | Fremantle (Rottnest) | 1889 | WA Almanack |
| Couderot | H. | Overseer Salt Works, Rottnest | Fremantle | 1876 | Herald Almanack |
| Couderot | H. | Overseer Salt Works | Fremantle (Rottnest) | 1877 | Herald Almanack |
| Couderot | H. | Overseer Salt Works | Fremantle (Rottnest) | 1878 | Herald Almanack |
| Coughlan | Patrick | | Northam | 1897 | Witton's Directory |
| Could | L. H. L . | - | De Grey River | 1879 | Herald Almanack |
| Couldry | J. | | Parker's Range | 1897 | Witton's Directory |
| Coulson | C. | Undertaker & Furniture Maker | James Street, Perth | 1897 | Witton's Directory |
| Coulston | J. | Carpenter | Fremantle | 1876 | WA Almanack |
| Coulston | J. | Carpenter | Fremantle | 1877 | WA Almanack |
| Coulston | J. | House Proprietor | Fremantle | 1879 | Herald Almanack |
| Coulston | Jno. | Carpenter | Fremantle | 1875 | Herald Almanack |
| Coulston | Jno. | Carpenter | Fremantle | 1875 | WA Almanack |
| Coulston | Jno. | Carpenter | Fremantle | 1876 | Herald Almanack |
| Coulston | Jno. | Carpenter | Fremantle | 1877 | Herald Almanack |
| Coulston | Jno. | Carpenter | Fremantle | 1878 | Herald Almanack |
| Coulston | Jno. | Carpenter | Fremantle | 1879 | WA Almanack |
| Coulston | Jno. | Carpenter | Fremantle | 1880 | WA Almanack |
| Coultas | James | Tailor | 57 Barrack Street, Perth | 1897 | Witton's Directory |
| Coultas | Jas. | Tailor (workroom) | Alpha Chambers, 53 Howick Street, Perth | 1897 | Witton's Directory |
| Coulter | - | Police Constable | Mount Magnet | 1897 | Witton's Directory |
| Coulter | Brown. & Co. | Monumental Masons | Goderich Street, Perth | 1897 | Witton's Directory |
| Coulter | Jas. | Proprietor, Cardiff Castle Restaurant | Bayley Street, Coolgardie | 1897 | Witton's Directory |
| Coulter | R. | | Roe Street, Perth | 1897 | Witton's Directory |
| Coulter | S. | Baker | Lindsay Street, Coolgardie | 1897 | Witton's Directory |
| Counnoughton | J. | Mounted Constable | York | 1870 | WA Almanack |
| Counsel | A. | Greengrocer | Victoria Avenue, North Fremantle | 1897 | Witton's Directory |
| Counsel | A. & Co. | Grocers, Ironmongers, & General Importers | Bayley Street, Coolgardie | 1897 | Witton's Directory |
| Counsel | Alan | Clerk | York | 1887 | WA Almanack |