LLJ and llj may refer to:
Transportation
Airports Challis Airport (FAA code) in Idaho, United States Silampari Airport (IATA code) in Lubuklinggau, South Sumatra, Indonesia
Railways Lalganj railway station (India Railways station code), a railway station in Uttar Pradesh, India Llandudno Junction railway station (National Rail station code) in Wales
Other uses Ledji-Ledji language (ISO 639-3 code: ), an Australian Aboriginal language Lithuanian Liberal Youth (), a political youth organization "Long Live Jahseh", a phrase in support of American rapper and singer XXXTentacion, who was murdererd in 2018 Low-level jet, a type of jet stream Low Level Jet, a subcomponent in the South American monsoon system