| COMECON | Comecon |
| Comic Book Guy | Comic Book Guy |
| Comino | Comino |
| Commander in Chief | Commander in Chief |
| Commander Keen | Commander Keen |
| Commedia dell'arte | Commedia dell'arte |
| Commerzbank-Arena | Commerzbank-Arena |
| Commerzbank-Tower | Commerzbank Tower |
| Commodore Amiga | Amiga |
| Commodore International | Commodore |
| Commodus | Commodus |
| Common Unix Printing System | CUPS |
| Commonwealth of Nations | Samväldet |
| Comorerne | Komorerna |
| Comosøen | Comosjön |
| Company of Heroes | Company of Heroes |
| Compiler | Kompilator |
| Compiègne | Compiègne |
| Comptonspredning | Comptonspridning |
| computer | dator |
| Computer aided design | CAD |
| Computeranimationsfilm | Lista över datoranimerade långfilmer |
| Computergrafik | Datorgrafik |
| Computermus | Datormus |
| Computerprogram | Programvara |
| Computerprogrammering | Programmering |
| Computerspil | Datorspel |
| Computerspilsudvikler | Lista över datorspelsutvecklare |
| Computervirus | Datorvirus |
| COMSOL Multiphysics | Femlab |
| Comte de Lautréamont | Comte de Lautréamont |
| Conakry | Conakry |
| Conan the Barbarian | Conan Barbaren |
| CONCACAF | CONCACAF |
| Concord | Concord |
| Concorde | Concorde |
| Concordia | Concordia |
| Concurrent Versions System | Concurrent Versions System |
| Condoleezza Rice | Condoleezza Rice |
| Coney Island | Coney Island |
| Confessions of a Teenage Drama Queen | Tonårsliv |
| Confessions Tour | Confessions Tour |
| Confédération Africaine de Football | CAF |
| Congo | Kongo |
| Congofloden | Kongo |
| CONMEBOL | CONMEBOL |
| Conn Smythe Memorial Trophy | Conn Smythe Trophy |
| Connacht | Connacht |
| Connecticut | Connecticut |
| Connemara | Connemaraponny |
| Connie Nielsen | Connie Nielsen |
| Conquer Online | Conquer |
| Conquistador | Conquistador |
| Constans | Constans |
| Constantius I Chlorus | Constantius I Chlorus |
| Constantius II | Constantius II |
| Constanze Mozart | Constanze Mozart |
| Constanţa | Constanţa |
| Constellation-programmet | Constellationprogrammet |
| Consul | Konsul |
| Converse All-Star | Converse |
| Cook-øerne | Cooköarna |
| Cookie | Cookies |
| Cookøerne | Cooköarna |
| cool | cool |
| Cool jazz | Cool jazz |
| Coolio | Coolio |
| Coop | Coop Norden |
| Cooper test | Coopers test |
| Copa América | Copa América |
| Copa del Rey | Copa del Rey |
| Copacabana | Copacabana |
| Coppa Italia | Coppa Italia i fotboll |
| Copycat kriminalitet | Copycat brott |
| Copyleft | Copyleft |
| Copyright | Upphovsrätt |
| Copán | Copán |
| Corazon Aquino | Corazon Aquino |
| Corazón Aquino | Corazon Aquino |
| Cordelia | Cordelia |
| Coreper | Coreper |
| Corey Taylor | Corey Taylor |
| Coriolanus | Coriolanus |
| Corioliseffekten | Corioliseffekten |
| Cork | Cork |
| Cornelius Fudge | Cornelius Fudge |
| Cornwall | Cornwall |
| Coromandelkysten | Koromandelkusten |
| Corriere della Sera | Corriere della Sera |
| Corrèze | Corrèze |
| Corse-du-Sud | Corse-du-Sud |
| Cortes | Cortes Generales |
| Cortezhavet | Californiaviken |
| Corto Maltese | Corto Maltese |
| Coruscant | Coruscant |
| Corvus | Kråkor |
| Cory I det hvide hus | Cory i Vita Huset |
| Cosinusrelation | Cosinussatsen |
| Cosmopolitan | Cosmopolitan |
| cost-benefit-analyse | lönsamhetsanalys |
| 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 | Coulrofobi |
| Count Basie | Count Basie |
| Counter-Strike | Counter-Strike |
| Country | Countrymusik |
| County Carlow | Carlow |
| County Cavan | Cavan |
| County Clare | Clare |
| County Cork | Cork |
| County Donegal | Donegal |
| County Dublin | Dublin |
| County Fingal | Fingal |
| County Galway | Galway |
| County Kerry | Kerry |
| County Kildare | Kildare |
| County Kilkenny | Kilkenny |
| County Laois | Laois |
| County Leitrim | Leitrim |
| County Limerick | Limerick |
| County Longford | Longford |
| County Louth | Louth |
| County Mayo | Mayo |
| County Meath | Meath |
| County Monaghan | Monaghan |
| County Offaly | Offaly |
| County Roscommon | Roscommon |
| County Sligo | Sligo |
| County Tipperary | Tipperary |
| County Waterford | Waterford |
| County Westmeath | Westmeath |
| County Wexford | Wexford |
| County Wicklow | Wicklow |
| courgette | zucchini |
| Courteney Cox | Courteney Cox |
| Courtney Love | Courtney Love |
| Covasna | Covasna |
| Covent Garden | Covent Garden |
| Coventry | Coventry |
| cowboy | cowboy |
| Cowpers kirtel | Cowpers körtlar |
| Coyote Ugly | Coyote Ugly |
| Cozumel | Cozumel |
| CPR-nummer | Personnummer |
| Cracker | Crackare |
| Cradle of Filth | Cradle of Filth |
| Craig Jones | Craig Jones |
| Crash Bandicoot | Crash Bandicoot |
| Crashdiet | Crashdïet |
| Crawford | Crawford |
| crawl | crawl |
| Crazy Horse | Crazy Horse |
| Creative Commons | Creative Commons |
| Creighton Abrams | Creighton Abrams |
| creme | grädda |
| cremefarve | krämfärg |
| cremefarvet | krämfärg |
| Cremefraiche | Crème fraîche |
| Cressida | Cressida |
| Creuse | Creuse |
| Cristian Mungiu | Cristian Mungiu |
| Cristiano Lucarelli | Cristiano Lucarelli |
| Cristiano Ronaldo | Cristiano Ronaldo |
| Cristina Fernández de Kirchner | Cristina Fernández de Kirchner |
| Cristo Redentor | Cristo Redentor |
| Critérium du Dauphiné Libéré | Dauphiné Libéré |
| CRM | Customer Relationship Management |
| Crnojević-dynastiet | Crnojevićdynastin |
| Crnojević-Ivan I | Crnojević Ivan I |
| Crnojević-Stefan | Crnojević Stefan |
| Crnojević-Stefanica | Crnojević Stefanica |
| croissant | giffel |
| Croix de Guerre | Croix de Guerre |
| Crooner | Croon |
| Crossosomatales | Crossosomatales |
| Crossover | Crossover |
| Crossroads | Crossroads |
| Crowd surfing | Poetry slam |
| CRP | C-reaktivt protein |
| Cruel Intentions | En djävulsk romans |
| Crust punk | Crust |
| Crystal Palace | Crystal Palace |
| Crédit Agricole | Crédit Agricole |
| Créteil | Créteil |
| CSKA Moskva | PFC CSKA Moskva |
| CSS | Cascading Style Sheets |
| CSU | CSU |
| Ctesiphon | Ktesifon |
| Cthulhu | Cthulhu |
| Cuauhtémoc | Cuauhtémoc |
| Cuba | Kuba |
| Cuba Libre | Cuba Libre |
| Cubakrisen | Kubakrisen |
| Cubanske revolution | Kubanska revolutionen |
| Culiacán | Culiacán |
| Culpa | Culpa |
| Culture Club | Culture Club |
| Culture Haiti | Haiti |
| Cumulus | Cumulus |
| Cunningham | Cunningham |
| Cunninghamhal | Cunningham |
| cup | pokal |
