Lord Thomas may refer to:

Miles Thomas, Baron Thomas (1897–1980), peer and aviation executive

John Thomas, Baron Thomas of Cwmgiedd (born 1947), British judge

Martin Thomas, Baron Thomas of Gresford (born 1937), Liberal Democrat peer, lawyer and former Deputy High Court judge

Peter Thomas, Baron Thomas of Gwydir (1920-2008), Conservative politician

Terence Thomas, Baron Thomas of Macclesfield (1937–2018) Labour Co-op peer and retired banker

Hugh Thomas, Baron Thomas of Swynnerton (1931–2017), Crossbench peer, historian and former diplomat