Liam Kavanagh (born 9 February 1935) is a former Irish Labour Party politician. He was first elected to Dáil Éireann at the 1969 general election as a Labour Party Teachta Dála (TD) for the Wicklow constituency. He remained in the Dáil until losing his seat at the 1997 general election. He was appointed to the European Parliament on two occasions in 1973 and 1977 and he was elected to the parliament in 1979 for the Leinster constituency. He gave up his seat on being appointed a Minister in 1981.
Kavanagh is the nephew of James Everett, a former Labour Party cabinet minister. Liam Kavanagh also served as a member of the British–Irish Parliamentary Assembly from 1990 to 1997 and the Semi-State Bodies Commission from 1987 to 1997, being Chairman from 1995 to 1997.
He was appointed to the Standards in Public Office Commission, on its establishment in December 2001.
His son Conal Kavanagh is a member of Wicklow County Council and Wicklow Town Council since 2004.