Kalju may refer to several things associated with Estonia:
Kalju, Lääne County, village in Lääne-Nigula Parish Kalju, Saare County, village in Saaremaa Parish Kalju (given name), Estonian male given name JK Nõmme Kalju, football club based in Nõmme, Tallinn
See also
Kallu (name) Kilju, Finnish home-made alcoholic beverage