| CODE Sports | codesports.com.au | 1 |
| COPE: Committee on Publication Ethics | publicationethics.org | 1 |
| CSIRO | csiro.au | 2 |
| CSIRO jobs | jobs.csiro.au | 2 |
| CSO Online | csoonline.com | 1 |
| Capital Brief | capitalbrief.com | 1 |
| CarExpert | carexpert.com.au | 2 |
| Careers Vic | careers.vic.gov.au | 1 |
| Carsales | carsales.com.au | 1 |
| Cdn | cdn.theconversation.com | 0 |
| Centre for Excellence in Child and Family Welfare | cfecfw.org.au | 1 |
| Cloud Security Alliance | cloudsecurityalliance.au | 1 |
| CoinSpot | coinspot.com.au | 2 |
| CoinSpot | www.coinspot.com.au | 1 |
| Coinstash | coinstash.com.au | 1 |
| Commonwealth Bank of Australia | commbank.com.au | 6 |
| Commonwealth Bank of Australia Newsroom | www.commbank.com.au | 1 |
| CompuServe.com | compuserve.com.au | 0 |
| Compuserve | compuserve.com | 1 |
| CoreLogic Australia | corelogic.com.au | 1 |