LJ may refer to:
Ljubljana (Slovene: [ljuˈbljàːna], 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.
Ljungby (Swedish pronunciation: [jʉːŋ.byː]) is the central locality of Ljungby Municipality, Kronoberg County, Sweden, with 15,785 inhabitants in 2015.
LJN Toys, Ltd. was an American toy company and video game publisher in operation from 1970 to 1995. It manufactured toy lines and released battery operated water guns and video games based on licensed properties from movies, television shows, and celebrities.
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.
Ljubodrag "Duci" Simonović (Serbian Cyrillic: Љубодраг Дуци Симоновић; born 1 January 1949) is a Serbian philosopher, author and retired basketball player.
Ljubo Milicevic (Croatian: Ljubo Miličević; born 13 February 1981) is an Australian footballer who currently plays for National Premier Leagues Victoria 2 team Dandenong City SC.