C
- Cabo Luna: tropical Latin American country and major tourist destination in the TV series Generator Rex
- Cacklogallinia: kingdom off the coast of South America, from A Voyage to Cacklogallinia by Captain Samuel Brunt
- Cagliostro: a tiny, mountainous European duchy in the Lupin III film The Castle of Cagliostro
- Calbia: a tiny Balkan republic in the Doc Savage adventure "The King Maker"
- Calia: from Modesty Blaise episode "The Jericho Caper"
- Candover: medieval country in the novel Rats and Gargoyles by Mary Gentle
- Cantania: Another South American country in The Kid Who Became President
- Cap'D'Far: a small island country from an episode of Scarecrow and Mrs. King. Its only export are fish bones.
- Cape Suzette: city-state inhabited by anthropomorphic animals, the main setting of the animated series Tale Spin
- Carbombya: a country mentioned in the Transformers series
- Carpania: Ruritania-like European kingdom in the film The Great Race
- Carpathia: Balkan kingdom in the play The Sleeping Prince by Terence Rattigan and the subsequent film The Prince and the Showgirl
- Cascara: a tiny Caribbean island in the film Water
- Caspak: a huge island country located in the South seas somewhere between South America and Australia in Edgar Rice Burroughs' The Land That Time Forgot and its sequels
- Caspiar: The supposed homeland of Andy Kaufman's "foreign man" character.
- Castlebury: a small European Duchy located near Liechtenstein, run by Edward Duke of Castlebury in the 2011 film A Princess for Christmas.
- Cayuna: a Caribbean island modelled on Jamaica in the novels of John Hearne
- Celama, Kingdom of: a mythical land in novels El reino de Celama by Luis Mateo Díez
- Celtica: a country resembling Wales in the Ranger's Apprentice book series by John Flanagan
- Cenktrich: Central European country in the video game Front Mission: Gun Hazard
- Champina: European Country in the short story "Small Country" by Nick Hornby
- Cheezburgerstan: Kingdom located in either Central or Eastern Europe in the Mad Magazine comic strip feature Monroe.
- Chekia: mythical kingdom in the film The Only Thing
- Chernarus: post-Soviet republic in the video game ArmA 2
- Chimerica: Central American country from the computer game Hidden Agenda.
- Chirimoyandia: A communist dictatorship in a Perestroika-like process of democratization. It appears in the Mortadelo y Filemón comic La Gomeztroika.
- Chiroubistan: a perpetually wartorn Islamic Balkan country in the French comic strip "Henriette"
- Cimmeria: The territory of a pre-Ice Age barbarian tribe, Conan's people, in Conan the Barbarian.
- Citysville: A City in the TV Series The Powerpuff Girls where Professor Utonium and the Girls move to for a while but then moved back to Townsville because of all the Mean People in Citysville.
- Cleirville: A city-state in Europe in the Italian comic "Diabolik".
- Coalition States: A fascist empire founded upon the post-apocalyptic ruins of the American Midwest in the Rifts role-playing game.
- Cobra Island: A United Nations recognized island in the Gulf Of Mexico; focus of many stories in the G.I. Joe merchandise line
- Cohdopia: a fictional European principality that appeared in Ace Attorney Investigations: Miles Edgeworth
- Concordia: a European microstate, the setting of Peter Ustinov's play Romanoff and Juliet and the film of the same title.
- Condal Islands: a remote archipelago in the South Pacific in Dead Ground by Chris Amies.
- Confederated Gulf States: a Persian Gulf Monarchy in an episode of Spooks
- Cornada, Earth-C's version of Canada, as seen in Captain Carrot and His Amazing Zoo Crew.
- Cornea: monarchy (location unspecified) in the TV series Pair of Kings. Inhabited by British-accented triclopses.
- Coronia: a kingdom in the film King, Queen and Joker
- Cortuguay: revolution-wracked Latin American country in Harold Robbins novel and film the Adventurers.
- Costa Bravo: a Latin American country, from TV series The Bionic Woman.
- Costa Estrella: General Cain's fiefdom in Princess Protection Program
- Costa Gravas: South American country in the 2007 series Chuck
- Costa Lottsa: Tiny nation located between Italy and France, mentioned in San Sombrèro: A Land of Carnivals, Cocktails and Coups
- Costa Luna: Rosalinda's or Rosie's kingdom in Princess Protection Program
- Costa Morada: a small Central American state featured in the final episode of the 1980s TV series Miami Vice. Loosely based on Panama.
- Costa Negra: a Latin-American country, in the telefim Major Dad. Its capital is Los Limones.
- Costa Verde: small Central American state in Marvel Comics, home to Avengers member Silverclaw.
- Costaguana: setting of Joseph Conrad's Nostromo
- Country of the Blind, The: a country where all the population are blind, situated in a hidden valley near Ecuador, from a short story by H. G. Wells.
- Coventry: a kingdom in the Twitches novels and film series.
- Coxotopia: a doubly fictional country, made up by Dr. Cox in the TV Show Scrubs.
- Crab Island: a poor Caribbean island shaped like a crab, under the domination of Crocodile Island, in the Patrouille des Castors comics.
- Crab Key: a small island off of Jamaica and the base of the antagonist in Ian Fleming's Dr. No.
- Crim Tartary: in William Makepeace Thackeray's "The Rose and the Ring" (1854) (see also Paflagonia)
- Crocodile Island: a crocodile-shaped Caribbean island seemingly similar to Tahiti, in the Patrouille des Castors comics.
- Crusoeland: featured in Atoll K, a film featuring Laurel and Hardy.
- Curaguay: a Latin American banana republic from the series The A-Team and Hunter.
Read more about this topic: List Of Fictional Countries