Lieutenant-Colonel Sir Francis Edward Fremantle (29 May 1872 – 26 August 1943) was a physician and Conservative Party politician.
The son of Very Rev. the Hon. William Henry Fremantle, Dean of St Albans, he was educated at Eton and the University of Oxford before undergoing his medical training at Guy's Hospital. He held a commission as a surgeon-captain in the Hertfordshire Yeomanry and served in the Anglo-Boer War of 1899-1901. He eventually rose to the rank of Territorial Army lieutenant-colonel in the Royal Army Medical Corps, and was awarded the OBE for his service in the First World War in the 1919 Birthday Honours.
From 1902-16 he was County Medical Officer for Hertfordshire. From 1919-22 he sat as a Municipal Reform Party Member of the London County Council representing Camberwell, Dulwich and was chairman of the council's Housing Committee.
He was elected to the House of Commons as member of parliament for St Albans in 1919 and held the seat until his death. He was knighted in the 1932 Birthday Honours "for political and public services".
He was the author of four books: A Doctor in Khaki, Health and Empire, The Housing of the Nation and The Health of the Nation.
He died suddenly at his home in Hatfield aged 71.