Ivan Stewart Lloyd (June 6, 1903 – August 2, 1993) was a Jamaican medical practitioner and politician, representing the People's National Party (PNP). He served as Jamaica's first Leader of the Opposition from 1944 to 1949, minister of education and social welfare from 1955 to 1957, minister of home affairs from 1957 to 1959, and was minister of health between 1959 and 1962.