Sir Bernard Mallet, KCB (17 September 1859 – 28 October 1932) was a British civil servant.
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 presided over the World Population Conference, held in Geneva in 1927.
He married Marie Adeane, who at various times was a Maid of Honour to Queen Victoria and had two sons, one of whom was Sir Victor Mallet, the diplomat.