Harry Louis Nathan, 1st Baron Nathan, PC, TD, FBA, FSA (2 February 1889 – 23 October 1963) was a British Liberal politician who from 1934 onwards represented the Labour Party. He served two London seats non-consecutively and while serving the second seat was elevated to the House of Lords (by the creation of his peerage); five years later he served in two positions consecutively as a government minister in the Attlee Ministry until 1948.