| Constellation-programmet | Constellation |
| Consul | Consulat |
| Container | Container |
| Containment | Containment-Politik |
| Content Management System | Content-Management-System |
| Converse All-Star | Chuck Taylor All Star |
| Cook-øerne | Cookinseln |
| Cookie | HTTP-Cookie |
| Cookøerne | Cookinseln |
| cool | geil |
| Cool jazz | Cool Jazz |
| Coolio | Coolio |
| Coop Himmelbau | Coop Himmelbau |
| Cooper test | Cooper-Test |
| Cooperstown | Cooperstown |
| Copa América | Copa América |
| Copa del Rey | Copa del Rey |
| Copacabana | Copacabana |
| Copenhagen Business School | Copenhagen Business School |
| Coppa Italia | Italienische Pokalwettbewerbe |
| Copycat kriminalitet | Trittbrettfahrer |
| Copyleft | Copyleft |
| Copyright | Urheberrecht |
| Copán | Copán |
| Corazon Aquino | Corazon Aquino |
| Corazón Aquino | Corazón Aquino |
| Cordelia | Cordelia |
| Cordoba | Córdoba |
| Coreper | Ausschuss der Ständigen Vertreter der Mitgliedstaaten |
| Corey Taylor | Corey Taylor |
| Corinne Cléry | Corinne Clery |
| Coriolanus | Gnaeus Marcius Coriolanus |
| Corioliseffekten | Corioliskraft |
| Cork | Cork |
| Cornelius | Cornelier |
| Cornflakes | Cornflakes |
| Cornwall | Cornwall |
| Coromandelkysten | Koromandelküste |
| Corona | Korona |
| Coronavirus | Coronaviren |
| Coronie | Coronie |
| CORPG | Competitive Online Role-Playing Game |
| Corps diplomatique | Diplomatisches Corps |
| Corriere della Sera | Corriere della Sera |
| Corrèze | Corrèze |
| Corse-du-Sud | Corse-du-Sud |
| Cortes | Cortes Generales |
| Cortezhavet | Golf von Kalifornien |
| Corto Maltese | Corto Maltese |
| Corvus | Raben und Krähen |
| Cosinus | Sinus und Kosinus |
| Cosinusrelation | Kosinussatz |
| Cosmopolitan | Cosmopolitan |
| cost-benefit-analyse | Kosten-Nutzen-Analyse |
| Costa Rica | Costa Rica |
| Così fan tutte | Così fan tutte |
| Cotentin | Cotentin |
| Coton de Tulear | Coton de Tuléar |
| Cotonou | Cotonou |
| Cottbus | Cottbus |
| Coulomb | Coulomb |
| Coulrofobi | Coulrophobie |
| Count Basie | Count Basie |
| Counter-Strike | Counter-Strike |
| Country | Country-Musik |
| County Carlow | County Carlow |
| County Cavan | County Cavan |
| County Clare | County Clare |
