Desmond Geraghty (born 27 October 1943) is a former Irish politician and trade union leader. He was president of SIPTU from 1999 to 2004. He stood unsuccessfully at the 1984 European Parliament election for the Dublin constituency as a Workers' Party candidate. He briefly served as General Secretary of the Workers' Party from 1991–1992, succeeding Seán Garland and played a prominent role in events leading up to the split in that party. In 1992 Geraghty joined the newly founded Democratic Left party.