| Collège de France | College de France |
| Colmar | Colmar |
| Colombes | Colombes |
| Colombia | Kolumbie |
| Colombo | Kolombo |
| Colony Collapse Disorder | Colony Collapse Disorder |
| Colorado | Colorado |
| Colorado Avalanche | Colorado Avalanche |
| Colorado Rockies | Colorado Rockies |
| Coloradofloden | Colorado |
| Coloradoöknen | Colorado |
| Colosseum | Koloseum |
| Columbi ägg | Kolumbovo vejce |
| Columbia | Columbia |
| Columbia Center | Bank of America Tower |
| Columbia County | Columbia County |
| Columbia University | Columbia University |
| Columbiafloden | Columbia |
| Columbine-massakern | Masakr na Columbine High School |
| Columbo | Columbo |
| Columbus | Columbus |
| Columbus Blue Jackets | Columbus Blue Jackets |
| Comecon | Rada vzájemné hospodářské pomoci |
| Comet | Comet I |
| Comino | Comino |
| Comitium | Internetová diskuse |
| Comma-separated value | CSV |
| Commando | Commandos |
| Commedia dell'arte | Komedie dell'arte |
| Commerzbank Tower | Commerzbank Tower |
| Commerzbank-Arena | Commerzbank-Arena |
| Commodore | Commodore International |
| Commodus | Commodus |
| Common Agricultural Policy | Společná zemědělská politika |
| Common Gateway Interface | Common Gateway Interface |
| Commonwealth Stadium | Commonwealth Stadium |
| Communist Party of India | Komunistická strana Indie |
| Como | Como |
| Como Ama una Mujer | Como Ama Una Mujer |
| Comorerna | Komory |
| Comosjön | Como |
| CompactFlash | CompactFlash |
| Compomarino | Campomarino |
| Compsognathus | Compsognathus |
| Compton | Compton |
| Comptonspridning | Comptonův jev |
| Comrat | Komrat |
| Comédie-Française | Comédie-Française |
| Conakry | Conakry |
| CONCACAF | CONCACAF |
| concertina | koncertina |
| Concerto grosso | Concerto grosso |
| Concord | Concorde |
| Concorde | Concorde |
| Concordiatemplet | Chrám Concordie |
| Concurrent Versions System | CVS |
| Condoleezza Rice | Condoleezza Riceová |
| Condor | Condor |
| Confederations Cup | Konfederační pohár FIFA |
| Conflans-Sainte-Honorine | Conflans-Sainte-Honorine |
| Congo | Kongo |
| CONMEBOL | CONMEBOL |
| Connacht | Connacht |
| Connecticut | Connecticut |
| Connecticutfloden | Connecticut |
| Constantin Brancusi | Constantin Brâncuşi |
| Constantine | Konstantin |
| Constanţa | Constanţa |
| Constellationprogrammet | Program Constellation |
| Constitution Party | Konstituční strana |
| container | obal |
| Contortatall | Borovice pokroucená |
| Contras | Contra |
| Control | Klávesa Ctrl |
| Converse | Converse |
| Conwayrevet | Útes Conway |
| Cook County | Cook County |
| Cookies | HTTP cookie |
| Cooköarna | Cookovy ostrovy |
| Cooköarnas flagga | Vlajka Cookových ostrovů |
| Cool jazz | Cool jazz |
| copernicium | kopernicium |
| Copernicus | Koperník |
| Copleymedaljen | Copleyho medaile |
| Coppa Italia i fotboll | Italský fotbalový pohár |
| Coppa Italia і fotboll | Italský fotbalový pohár |
| Copyleft | Copyleft |
| copyright | autorské právo |
| copywriter | copywriter |
| Coracobrachialis | Hákový sval |
| Corbeil-Essonnes | Corbeil-Essonnes |
| Cordelia | Cordelia |
| Cordelia Chase | Cordelia |
| cordierit | cordierit |
| Cordoba | Córdoba |
| Corel | Corel Corporation |
| Corinne Hofmann | Corinne Hofmannová |
| Corioliseffekten | Coriolisova síla |
| Cork | Cork |
| Cornelia | Kornélie |
| Cornelius | Kornelius |
| Cornelius Nepos | Cornelius Nepos |
| Cornell University | Cornell University |
| Cornwall | Cornwall |
| Corot | Corot |
| Corpus | Jazykový korpus |
| Corpus Christi | Slavnost Těla a Krve Páně |
| Corpus Hermeticum | Corpus Hermeticum |
| Corpus juris civilis | Corpus iuris civilis |
| Correggio | Correggio |
| Cortona | Cortona |
| Coruscant | Coruscant |
| Corythosaurus | Corythosaurus |
| Cosenza | Provincie Cosenza |
| Cosimo den store | Cosimo de Medici |
| Cosimo den äldre | Cosimo de Medici |
| cosinus | kosinus |
| Cosinussatsen | Kosinová věta |
| Costa Brava | Costa Brava |
| Costa Rica | Kostarika |
| Costa Ricas fotbollslandslag | Kostarická fotbalová reprezentace |
| Così fan tutte | Così fan tutte |
| cotangent | kotangens |
| Cotonou | Cotonou |
| Cotopaxi | Cotopaxi |
| Cottage cheese | Cottage |
| Coulomb | Coulomb |
| Coulombs lag | Coulombův zákon |
| Count Basie | Count Basie |
| Counter-Strike | Counter-Strike |
| Country Code Top Level Domain | Seznam internetových domén nejvyššího řádu |
| Countrymusik | Country |
| County | Spolkový distrikt |
| Courteney Cox | Courteney Cox |
| Covasna | Covasna |
| Coven | Coven |
| Covent Garden | Covent Garden |
| Coventry | Coventry |
| Coventry City FC | Coventry City FC |
| cover | coververze |
| cowboy | kovboj |
| Cowgirl blues | I na kovbojky občas padne smutek |
| Cowpers körtlar | Cowperova žláza |
| Coyoacán | Coyoacán |
| Cozy Powell | Cozy Powell |
| CPU | Procesor |
| CR Vasco da Gama | Vasco da Gama |
| Crackare | Cracker |
| Cradle of Filth | Cradle of Filth |
| Crafoordpriset | Crafoordova cena |
| Crash | Pád |
| Crass | Crass |
| Crassus | Marcus Licinius Crassus |
| Crawford Long | Crawford Long |
| Crazy Horse | Splašený kůň |
| Creative Commons | Creative Commons |
| Creature Comforts | Mezi námi zvířaty |
| cree | kríjština |
| Cremona | Cremona |
| Cres | Cres |
| crescendo | crescendo |
| Cressida | Cressida |
| Creuse | Kroisos |
| Creutzfeldt-Jakobs sjukdom | Creutzfeldt-Jakobova nemoc |
| cricket | kriket |
| Crispinus | Crispin |
| Cristiano da Matta | Cristiano da Matta |
| Cristiano Ronaldo | Cristiano Ronaldo |
| Crohns sjukdom | Crohnova choroba |
| croissant | rohlík |
| Croix | Kříž |
| Cromwell | Cromwell |
| Cross site scripting | Cross-site scripting |
| Crotone | Crotone |
