KNJ may refer to:
- Kindamba Airport (IATA: KNJ), Republic of the Congo
- Akatek language (ISO-639-3: knj), a Mayan language spoken in Guatemala
- Krishnanagar City Junction railway station (station code: KNJ), India
- Kodomo no Jikan, Japanese manga and anime series
See also
edit- de:Kameradschaftsring Nationaler Jugendverbände, a neo-Nazi organisation