Sir Murray Louis Tyrrell KCVO CBE (1 December 1913 – 13 July 1994) was an Australian public servant. He was the Official Secretary to the Governor-General of Australia from 1947 to 1973. In his record term of 26 years, served six governors-general. In 1959, he was made a Commander of the Order of the British Empire (CBE). In 1977, he was named Australian of the Year with Dame Raigh Roe.
Tyrrell was born in Kilmore, Victoria. He married Ellen St Clair Greig on 6 May 1939. The couple had three children. He lived in Queanbeyan, New South Wales.
Tyrrell died on 13 July 1994 in Canberra of the Australian Capital Territory. He was 80.
