Cornelius James Pelly, CMG, OBE (8 April 1908 – 1985), was an Irish-born colonial official and diplomat. Pelly was the eldest son of Hyacinth Albert Pelly and Charity Maria Matthews of Heronsbrook, County Galway. Pelly was educated at Clongowes Wood College and Trinity College Dublin, from which he received a B.A. in 1928. Pelly was made a Member of the Order of the British Empire in 1944. In 1952 he became a Companion of the Order of St Michael and St George.