Ingvar Kjellson (20 May 1923 – 18 December 2014) was a Swedish stage and film actor. Kjellson was born in Kärna, Östergötland County. He was accepted at Dramatens elevskola in 1946. He worked as an actor at various theatres, and was part of the permanent ensamble at the Royal Dramatic Theatre from 1964. He had notable roles in a number of plays including Hedda Gabler, The Wild Duck, The Beggars' Opera and Twelfth Night. In 2013, he played the old servant Firs in The Cherry Orchard at Stockholm City Theatre.
He also worked in films including Zorn, Raskenstam, and Jazzgossen.
Kjellson won the Eugene O'Neill Award in 1978. He died at the age of 91 on 18 December 2014. He was married to actress Meta Velander until his death.