- Claire Ichou
- Clairmont Chung
- Clara Barata | Público
- Clare Byarugaba
- Clarence Ellis
- Claude Gatebuke and Alice Gatebuke
- Claude Gatebuke and Kambale Musavuli
- Claude Mangin
- Claude Quemar
- Claude Ribbe
- Claudia Wegener
- Cláudio Furtado
- Claudio Pinnock
- Claudio Schuftan
- Claudio Schuftan, Laura Turiano and Abhay Shukla
- Claudy Vouhé
- Claus-Dieter König
- Clayton Peel
- Clélia R. S. Preste
- Clélia R. S. Prestes
- Clélia R. S. Prestes & Esdras Guerreiro Vasconcellos
- Clement Masakure
- Cleo Fychan
- Cleo Manago
- Clive Nettleton
- Clube K
- Coady International Institute
- Coalition de la Cour Pénale Internationale
- Coalition des Osc sur la Bad
- Coalition for Human Rights in Gambia and Senegal