Thomas Horder, 1st Baron Horder

The Right Honourable The Lord Horder GCVO
Thomas Jeeves Horder in 1921
Born	(1871-01-07)7 January 1871 Shaftesbury, Dorset
Died	13 August 1955(1955-08-13) (aged 84) Petersfield, Hampshire
Nationality	English
Occupation	physician

Thomas Jeeves Horder, 1st Baron Horder, GCVO (7 January 1871 – 13 August 1955) was an English physician recognized as a leading clinician and diagnostician of his day.

Thomas Jeeves Horder was born on 7 January 1871, the son of draper Albert Horder, in Shaftesbury, Dorset. Jeeves was his mother's maiden name. He was educated privately, and at the University of London and St Bartholomew's Hospital, London.

Horder began his career at St Bartholomew's Hospital and, when still quite young, successfully made a difficult diagnosis on King Edward VII which made his reputation. His patients included every British monarch from Edward VII to Elizabeth II (except Edward VIII). They also included two prime ministers, Ramsay MacDonald and Bonar Law, and labour leader Hugh Gaitskell.

He was involved in many official committees including advising the Ministry of Food during World War II. After the war he opposed many of Aneurin Bevan's plans for a national health service and may have helped modify some of those less palatable to the medical profession.

He held the positions of Deputy Lieutenant County of Hampshire; Extra Physician to the Queen (formerly Extra Physician to King George VI); and Consulting Physician to St Bartholomew's Hospital (1912–1936). Knighted in 1918, he was created a Baronet in 1923. He was raised to the peerage as Baron Horder, of Ashford in the County of Southampton on 23 January 1933.

Horder served as president of the British Eugenics Society from 1935 to 1949 and as president of the Cremation Society of Great Britain from 1940 to his death in 1955.