RJN
RJN may refer to:

 Council of National Unity (Rada Jedności Narodowej, RJN), a defunct quasi-parliament of the Polish Underground State during World War I
 Rafsanjan Airport (IATA: RJN), an airport in Rafsanjan, Iran
 Rajnandgaon railway station (Indian Railways station code: RJN), a railway station in Chhattisgarh, India
 Ram Janmabhoomi Nyas, an Indian trust overseeing the building of The Ram Mandir in Ayodhya