Kalju Orro (born March 27, 1952) is an Estonian stage, film and television actor, acting instructor, lecturer, theatre producer, and pedagogue.

Kalju Orro was born in Tartu, where he attended primary and secondary schools. He is a 1970 graduate of Tartu 17 Vocational School. Afterward, he enrolled in the Vanemuine Drama Studios in Tartu, graduating in 1971. In 1972, he enrolled in the Performing Arts Department of Tallinn State Conservatory (now, the Estonian Academy of Music and Theatre) under instruction of actor and theatre pedagogue Voldemar Panso, graduating in 1976. Among his graduating classmates were Merle Karusoo, Ago-Endrik Kerge, Urmas Kibuspuu, Lembit Peterson, Aare Laanemets, Jüri Krjukov, Anne Paluver, Külliki Tool, Priit Pedajas, Eero Spriit, and Peeter Volkonski.