Lieutenant-Colonel Thomas Samuel Beauchamp Williams (1877 – 7 July 1927)^[1] was a British physician of the Indian Medical Service, and a Labour Party politician. He was the Member of Parliament (MP) for the Kennington division of Lambeth from 1923 to 1924.^[1]

In 1902, he passed out from the Army Medical School, Punjab, and gained the rank of Lieutenant in the Indian Medical Service. He reached the rank of Lieutenant-Colonel, a brevet promotion in the Indian Medical Service in 1917,^[2] serving through the First World War. In 1922, he criticised the hospitals policy of the British Medical Association from the Labour Party point of view.^[3]

Williams first stood for Parliament at the 1922 general election in Bridgwater division of Somerset, where came a poor third with only 6.7% of the votes.^[4] At the 1923 general election he stood in Kennington, a Conservative-held seat which he won^[5] with a majority of 2.4% of the votes.^[6] However, he was defeated at the next general, election in October 1924 by the Conservative candidate George Harvey,^[6] and polled a poor third at the June 1925 by-election in Eastbourne,^[7] after which he did not stand again.