Horace Brimson Trevor-Cox (14 June 1908 – 30 October 2005) was a British farmer, landowner and politician who served from 1937 to 1945 as a Conservative Member of Parliament (MP), but left the Conservatives in the 1960s and subsequently joined the Labour Party.
Born in Birkenhead and brought up near Chester, his father (also named Horace Cox) was a successful businessman. Cox was educated at Eton College, where he was a good friend of his contemporary Quintin Hogg, later Lord Hailsham. He then studied in Germany at Leibniz University Hannover, and worked in factories in Berlin before leaving Germany in 1929 to study business studies in the United States at the University of Cincinnati.