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- Laevatia: Balkan nation from Nevil Shute's Ruined City.
- Lanconia: Eastern European country referenced in Jude Deveraux's romance novels.
- Latkovia: An Eastern nation featured in the Amalgam Comics crossover between Marvel Comics and DC Comics.
- Latveria: a kingdom in the Fantastic Four comic-book series ruled by tyrannical Doctor Doom.
- Latvislavia: A fictional European country in Donald Duck. Known of its national football team.
- Laurania: the republic in Savrola (A Tale of the Revolution in Laurania) by Winston Churchill.
- Lavernia: Eastern European country in the movie Another Meltdown (Bi xie lan tian).
- Letzenstein: a tiny state, presumably based on Liechtenstein, which is featured in Meriol Trevor's "Letzenstein Chronicles" series of books.
- Leutonia: Eastern European home of the Happy Wanderers (Yosh & Stan Shmenge) from SCTV.
- Lichtenburg: made famous by Ethel Merman in the musical comedy Call Me Madam.
- Lichtenburg: a Balkan grand duchy in the film The Son of Monte Cristo.
- Lichenstamp: a country in one episode of the comedy series The Suite Life on Deck.
- Lissenberg: appeared in Jane Aiken Hodge's Leading Lady (1990).
- Litzenburg: Politically neutral country in Central Europe from Infocom's interactive fiction game Border Zone, bordering communist Frobnia.
- Lucrania: pro-Nazi country bordering Germany, France and Switzerland in Biggles - Secret Agent by W. E. Johns.
- Lutha: a small Balkan kingdom from the novel The Mad King by Edgar Rice Burroughs.
Read more about this topic: List Of Fictional European Countries