Edward Tyas Cook (1857-1919) was an English journalist and writer. Cook was the youngest son of Silas Kemball Cook and his wife Emily (née Archer). He studied at New College, Oxford and was president of the Oxford Union (1879). In 1884, he married Emily Constance Baird (d.1903).

Cook was editor of the Pall Mall Gazette from 1889 until the paper was sold to W.W. Astor (in the Tory interest) in 1892. Consequently, Cook started the Westminster Gazette, of which he was editor between 1893 and 1895. Cook then became editor of the Daily News, but left after differences of opinion over how to cover the Boer War (he was a Liberal Imperialist). Cook worked for the Daily Chronicle between 1900 and 1910.

With Alexander Wedderburn, Cook edited the extensive Works of John Ruskin which were published in 39 volumes between 1903 and 1911. Cook also produced biographies of Florence Nightingale (1913) and The Times editor John Thadeus Delane (1915), as well as handbooks for the National Gallery, the Tate Gallery, and the British Museum. He was knighted in 1912, and made a KBE in 1917. He died aged 62 in September 1919 and was buried in South Stoke, Oxfordshire.

For a full biography, see Oxford Dictionary of National Biography.