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- Paflagonia: in William Makepeace Thackeray's "The Rose and the Ring" (1854) (see also Crim Tartary).
- Paiiz: A republic that joins pact against communist threat from the novel Operation Roughneck.
- Pala: island utopia in Aldous Huxley's Island.
- Palfania:
- Palmont: from Need For Speed Carbon.
- Palombia: home of the Marsupilami from the Spirou et Fantasio and Marsupilami comics.
- Panau: An island nation in southeast Asia, the setting for the video game Just Cause 2.
- Panem: Totalitarian dictatorship in a dystopian United States that consists of thirteen districts, which arose after the fall of America in the Suzanne Collins trilogy, The Hunger Games.
- Panquita: European monarchy mentioned in second season of the anime Yakitate!! Japan. A member of that nation's royal family, Princess Anne, was a guest judge at the baking exhibition.
- Palmolive: A European Country found to the west of England with Capital City as Rai and having main towns: Caro, Algatia, Esha, Safaira, Nova, Phoenix, Ducray and Rosa. A country found in the computer game SimCity 4.
- Parador: Latin American country in the film Moon Over Parador.
- Paragonia: Latin American country in the film The Americano.
- Parazuela: Latin American country in the film The Magnificent Two.
- Parmistan: mountainous south Asian country, bordering the Caspian Sea, in the film Gymkata.
- Paslan: a Russian breakaway republic featured in the 2009 science-fiction film Universal Soldier: Regeneration.
- Pathos: neighbor of Mypos, part of a different Tri-Island Area in Perfect Strangers
- Patusan: an island nation somewhere in the South China Sea in the film Surf Ninjas as well as in the film The Last Electric Knight and the TV series Sidekicks. Also mentioned in Lord Jim by Joseph Conrad.
- Peaceland: European country featured in the anime Nadesico, which was once a theme park, but formed its own nation. It is neutral in all conflicts, on earth and beyond, has no taxes, and has a great banking system similar to that of Switzerland. Ruri Hoshino aka "Ruri Ruri", a famous character of the series, is originally a princess from there.
- Pelegostos: an island from the film Pirates of the Caribbean: Dead Man's Chest, inhabited by cannibals.
- Penguin Island (L'île des Pingouins): in the 1908 novel by Anatole France, an island in the North Sea where penguins were miraculosly transformed into humans (and which is in fact a satirical view of France).
- People's Republic of Clara: Land ruled by Admin Clara from Project Rockstar.
- Pepeslavia: from Su Excelencia film starring Mario Moreno "Cantinflas". A parody of the U.S.S.R.
- Pepperland: from The Beatles' film Yellow Submarine. It was a peaceful, psychedelic land that was attacked by the Blue Meanies.
- Percebelandia (Republic of): A country in danger due to the mercenaries of Cefalopodia. Spanish secret agentes Mortadelo y Filemón help them to win the war in the comic Los mercenarios.
- Perusalem: land ruled by The Inca of Perusalem in the short satiric play by George Bernard Shaw
- Petoria: from the "E. Peterbus Unum" episode of Family Guy
- Phaic Tăn: South East Asian country from a parody travel guidebook; from the same authors as Molvanîa and San Sombrèro.
- Pharamaul: a British island protectorate five hundred miles off the southwest coast of Africa from the novel The Tribe That Lost Its Head by Nicholas Monsarrat.
- Phatt Island: an island in the Caribbean in the game Monkey Island 2: LeChuck's Revenge
- Pfennig Halbpfennig: presumably German/Eastern European Grand Duchy and setting for the operetta The Grand Duke, by Gilbert and Sullivan. Notable for an unusual law regarding "Statutory Duels", in which duelists compete by drawing playing cards - the loser then dies and becomes a "legal ghost".
- Pianostan: a country once visited by Inspector Gadget where its people remain happy so long as their King remains miserable
- Picta: a country resembling Scotland in the Ranger's Apprentice book series by John Flanagan
- Pigmania: A pig-shaped country featured in the 1942 cartoon Blitz Wolf.
- The Pit: A dome of the Matoran Universe in BIONICLE used by the Order of Mata Nui to hold the universe's most dangerous people.
- Pixie Hollow: Is The Never Fairy Kingdom in Neverland, where Tinker Bell and her tiny fairy friends live and dwell.
- Plunder Island: a pirate island in the Caribbean in the game The Curse of Monkey Island, part of the Tri-Island area (governed by Elaine Marley)
- Poictesme: a country situated roughly in the south of France in the books of James Branch Cabell
- Poketopia: Place Where Pokémon Trainers around the world battle pokémon in the video game Pokémon Battle Revolution.
- Pokolistan: A former Soviet Republic in the DC Comics universe formerly ruled by General Zod
- Pokoponesia: island nation from the animated version of The Tick
- Poldévie: Eastern European country in a famous petition in the 1930s and in many novels by Jacques Roubaud.
- Polrugaria: Archetypal Communist-ruled East European country in Isaac Deutscher's 1952 essay "The Tragic Life of a Polrugarian Minister" .
- Pomerania: a nation in the film Anchors Aweigh. It has a navy which accepts non-Pomeranians. Not to be confused with the real Pomerania, formerly a region in Poland and Germany
- Pontevedro: a poverty-stricken Grand Duchy situated deep in the Balkans from the comedy play L'Attaché d'ambassade by Henri Meilhac and the subsequent operetta and film The Merry Widow. Pontevedro is a veiled reference to the Balkan country of Montenegro.
- Porto Guava: A small police state in Latin America featured in the Joe 90 episode "Big Fish".
- Porto Santo: a tiny island nation in Latin America visited by Steve Urkel in the Family Matters episode "South of the Border" (Note: Porto Santo is a real island of Madeira Archipelago).
- Potarneyland, Republic of: A country situated somewhere on the Indian subcontinent and featured in several episodes of The Navy Lark.
- Pottibakia: Balkan country from the short story "What Does it Matter? A Morality" by E. M. Forster. Capital city: Ekarest.
- Pottsylvania: from Jay Ward's The Rocky and Bullwinkle Show
- Povia: a small monarchy in the Balkans in the Mission: Impossible TV episode "The Heir Apparent"
- Poyais: a fictional Central American country invented by the 19th Century adventurer Gregor MacGregor in order to gain a lot of money from credulous people in Britain and France
- Pulsovia: an Eastern European country where Jarek comes from in the Spanish sketch program La hora de José Mota.
- Prajevitza: a former socialist republic in Eastern Europe, in the Spanish-French film Krapatchouk (1993), directed by Enrique Gabriel
Read more about this topic: List Of Fictional Countries