Louisa Jo Killen (né Louis Killen; 10 January 1934 – 9 August 2013) was an English folk singer from Gateshead, Tyneside. Killen also played English concertina and sang both unaccompanied and using this instrument to accompany herself while singing. Killen formed one of Britain's first folk clubs in 1958 in Newcastle upon Tyne and became a professional folk singer in 1961. In the 1970s Killen recalled: "When I started Folk Song and Ballad in Newcastle in 1958 there weren't twenty folk clubs in the whole country, and when I left for the States (in 1966) there were maybe three hundred." Recordings of Killen singing some Tyneside songs were included in The Iron Muse (Topic Records 12T86, 1963).