Richard Gavin Gardiner Casey, Baron Casey KG, GCMG, CH, DSO, MC, KStJ, PC, FAA (29 August 1890 – 17 June 1976) was an Australian politician and diplomat, who served as the colonial governor of Bengal from 1944 to 1946 and as the 16th Governor-General of Australia from 7 May 1965 to 30 April 1969.