Ulf Dageby (born Ulf Thorbjörn Dageby on 10 May 1944; died 16 July 2024) was a Swedish rock musician, singer and songwriter remembered for his role in the leftist "rock orchestra" and theatre ensemble Nationalteatern. He released a series of solo albums in the 1980s. At the 18th Guldbagge Awards in 1982, he won the Special Achievement award. He later led the Ulf Dageby Band.