LJ may refer to:
Ljubljana (Slovene: [ljuˈbljàːna] ( listen), locally also [luˈblàːna]; also known by other, historical names) is the capital and largest city of Slovenia.
Ljubljana Jože Pučnik Airport (IATA: LJU, ICAO: LJLJ) (Slovene: Letališče Jožeta Pučnika Ljubljana), also known by its previous name Brnik Airport, is the international airport of Ljubljana, the capital of Slovenia.
Ljubljana Castle (Slovene: Ljubljanski grad, German: Laibacher Schloss) is a castle complex standing on Castle Hill above downtown Ljubljana, the capital of Slovenia.
LJN Toys, Ltd. was an American toy company and video game publisher in operation from 1970 to 1995. Its products included toys, battery-operated water guns, and video games based on licensed properties from movies, television shows, and celebrities.
Ljubodrag "Duci" Simonović (Serbian Cyrillic: Љубодраг Дуци Симоновић, pronounced [ʎǔbodrag dǔtsi simǒːnoʋitɕ]); born 1 January 1949) is a Serbian philosopher, author and retired basketball player.
Ljubomir Fejsa (Serbian Cyrillic: Љубомир Фејса, Rusyn: Любомир Фейса; born 14 August 1988) is a Serbian professional footballer who plays as a defensive midfielder for Portuguese club Benfica and the Serbia national team.
Ljubiša Stamenković (Serbian Cyrillic: Љубиша Стаменковић; born 21 July 1964 in Vlasotince) is a Serbian football manager.