Paddy Cardiff (8 November 1925 – 3 June 2005) was an Irish trade unionist.
Born in Dublin, into a family heavily involved in trade unionism, Cardiff left school at 13 and joined the British Army near the end of World War II.
He returned to Dublin in 1948, where he soon started work at Guinness, and became active in the Workers' Union of Ireland (WUI).
In 1969, he was elected as Deputy General Secretary of the WUI, in which role he led the union's campaign for Ireland to join the European Economic Community.
[1] He served as President of the Irish Congress of Trade Unions in 1983, then retired on account of ill health.