He was the son of Sir Louis Mallet. He was educated at Clifton College and Balliol College, Oxford. He became private secretary to Arthur Balfour. Later, he was Registrar General and President of the Royal Statistical Society from 1916 to 1918. Mallet was prominent in the Eugenics Society and presided over the World Population Conference, held in Geneva in 1927.
|Wikisource has original works written by or about:|
- Anon (1933) Obituary: Sir Bernard Mallet, Journal of the Royal Statistical Society, 96, (1), 148–151.
- "Clifton College Register" Muirhead, J.A.O. p52: Bristol; J.W Arrowsmith for Old Cliftonian Society; April, 1948
- "Royal Statistical Society Presidents". Royal Statistical Society. Archived from the original on 17 March 2012. Retrieved 6 August 2010.
- Sanger, Margaret (1927). Proceedings of the World Population Conference. London: Edward Arnold & Son.