Sir (John) Keith Waller CBE (19 February 1914 – 14 November 1992) was a senior Australian public servant and diplomat.

[2] In 1943 whilst senior officer to the Australian Legation at Chungking, Waller married Alison Dent in Bombay, India.

During this time he dealt with the fall-out of the Lorenzo Gamboa case, which saw a Filipino man separated from his wife and children due to the White Australia policy.

[9] Soon after his retirement, Waller prepared a brief assessing the Australian Government security and intelligence apparatus as it existed in the mid-1970s.

[11][12] In June 1961, Waller was appointed a Commander of the Order of the British Empire whilst Ambassador to the USSR.