Richard James Mulcahy was an Irish Fine Gael politician and army general who served as Minister for Education from 1948 to 1951 and 1954 to 1957, Minister for the Gaeltacht from June 1956 to October 1956, Leader of the Opposition from 1944 to 1948, Leader of Fine Gael from 1944 to 1959, Minister for Local Government and Public Health from 1927 to 1932 and Minister for Defence from January to April 1919 and 1922 to 1924. He served as a Teachta Dála (TD) from 1918 to 1938 and from 1943 to 1961 and a Senator from March 1938 to June 1938 and 1943 to 1944. He served in the cabinets of W. T. Cosgrave and John A. Costello.

The Leader of Fine Gael is the most senior politician within the Fine Gael political party in Ireland. Since 24 March 2024, the office has been held by Simon Harris following the resignation of Leo Varadkar.