- Z: fictional country used by the U.S. Department of State's Foreign Service Institute to train consular officers; location of the U.S. Consulate General in Rosslyn.
- Zagorias Federation: aq Mediterranean country, featured in Time Crisis 3 video game.
- Zakkestan: Ex-part of the USSR in the Dutch Agent 327 comic series.
- Zambezi: African monarchy from the film King Ralph
- Zambola: African nation in the video game Front Mission: Gun Hazard
- Zamunda: African monarchy from the film Coming to America
- Zandia: island located in the Mediterranean in DC Comics, ruled by the Brother Blood's cult.
- Zangaro: West African country in the book and film The Dogs of War
- Zanzibar Land: A country bordering the Middle East and, for a time, the only country to possess nuclear weapons in Metal Gear 2: Solid Snake
- Zarakal: West African country from Michael Bishop's novel No Enemy But Time
- Zarcovia: A Country That Is In "Ben 10: Ultimate Alien"
- Zekistan: Middle Eastern country between Afghanistan, Pakistan, China and Tajikistan in the video game Full Spectrum Warrior and Full Spectrum Warrior: Ten Hammers; its history and setting closely resemble Afghanistan's.
- Zembala: African country in the film The Wild Geese
- Zembla: Northern European country in Vladimir Nabokov's novel Pale Fire
- Zemenia: Central European country in Monk episode "Mr Monk Falls in Love"
- Zinariya: African country famous for its copper mines, ruled by a dictator, General Bindiga, in A. N. Wilson's My Name Is Legion
- Zlhatovica: European nation in "Troubling a Star" by Madeleine L'Engle from which one of the protagonists "Otto" is the prince of
- Zoravia: the country from where the title character in Princess Natasha comes from.
- Zoroastrian People's Republic of Inner Magadan, The: a state "between the Sea of Okhotsk and the Arctic Circle" in the novel The Business by Iain Banks. Apparently a conflation of the Jewish Autonomous Oblast, the Republic of Mahabad, and Inner Mongolia.
- Zuvendis: African country in Rider Haggard's Alan Quatermain containing a lost white race.
- Zwasi-Germany: Central Asian country from the popular Norwegian radio show Ken eller Torkil.
Read more about this topic: List Of Fictional Countries