Kalju (given name)

Kalju (meaning "cliff") is an Estonian-language male given name.

People named Kalju include:
 * Kalju Jurkatamm (born 1941), Estonian sprinter and hurdler
 * Kalju Kangur (1925–1989), Estonian writer and translator
 * Kalju Karask (1931–2011), Estonian opera and operetta singer and actor
 * Kalju Koha (born 1956), Estonian politician
 * Kalju Komissarov (1946–2017), Estonian actor
 * Kalju Kruusa (born 1973), Estonian poet, editor and translator
 * Kalju Lepik, (1920–1999), Estonian poet
 * (1932–2019), Estonian freedom fighter, Soviet dissident
 * Kalju Ojaste (born 1961), Estonian biathlete
 * Kalju Orro (born 1952), Estonian actor
 * Kalju Pitksaar (1931–1995), Estonian chess player
 * Kalju Põldvere (1929–2011), Estonian zoologist, medical doctor, educator and politician
 * (1921–2004), Estonian sculptor
 * Kalju Suur (1928–2013), Estonian photographer
 * Kalju Teras (1922–1990), Estonian educator
 * Kalju Tonuma, (born 1970), Australian audio artist