Nadia Evadne Cattouse (born 2 November 1924, in Belize City, British Honduras) is an actress, singer and songwriter, based in Britain since the 1950s.

She is best known for her acting roles in many British television programmes including Play for Today, Crown Court, Dixon of Dock Green and Johnny Jarvis. As a singer in the 1960s she performed at Les Cousins folk and blues club in Greek Street, London, and appeared on television programs including the BBC’s Sing Along and Hootenanny. On the folk scene she was a contemporary of Julie Felix and Fairport Convention, and was called by Melody Maker "one of the giants of the folk-song revival in Britain". With Robin Hall and Jimmie Macgregor she made Songs of Grief & Glory (1967). Her album Earth Mother (1970) was partly recorded at the 1969 Edinburgh Festival. Among other compilations, Cattouse features on Cult Cargo: Belize City Boil Up (2005), singing "Long Time Boy", and on the 1972 album Club Folk 2 (Peg Records PS3), singing "B. C. People" and "All Around My Grandmother's Floor".