James Thomas, 1st Viscount Cilcennin

The Right Honourable The Viscount Cilcennin KStJ PC
First Lord of the Admiralty
In office 31 October 1951 – 2 September 1956
Monarchs	George VI Elizabeth II
Prime Minister	Winston Churchill Sir Anthony Eden
Preceded by	The Lord Pakenham
Succeeded by	The Viscount Hailsham
Personal details
Born	13 October 1903 (1903-10-13)
Died	13 July 1960 (1960-07-14) (aged 56)
Nationality	British
Political party	Conservative
Alma mater	Oriel College, Oxford

James Purdon Lewes Thomas, 1st Viscount Cilcennin, KStJ PC (pronounced "Kilkennin"; 13 October 1903 – 13 July 1960), sometimes known as Jim Thomas, was a British Conservative politician. He served as First Lord of the Admiralty between 1951 and 1956.