F
- Falkasia: A virtual micronation created by avatar William Sommerfeld. Governed by the aforementioned avatar, it is stylized to resemble a Post-Cold War Eastern Bloc country under a predominately benevolent dictatorship.
- Fasilica: appeared in an early 1914 serial by Rex Stout, of later Nero Wolfe fame, reprinted in the 1990s as A Prize for Princes.
- Flavonia: appeared in Violet Needham's Betrayer (1950).
- Florin: one of the fictional principalities in William Goldman's novel The Princess Bride.
- Franistan: from the I Love Lucy episode 'The Publicity Agent' in which Lucy pretends to be the "Maharincess of Franistan", royalty from a faraway land who is a big fan of Ricky's, in order to get Ricky some publicity.
- Freedonia: From the Marx Brothers' movie Duck Soup. It is ruled by Rufus T. Firefly (Groucho Marx).
- Frobnia: Communist Eastern Bloc nation in Central Europe from Infocom's interactive fiction game Border Zone, bordering neutral Litzenburg.
Read more about this topic: List Of Fictional European Countries