Harvill Secker is a British publishing company formed in 2005 from the merger of Secker & Warburg and the Harvill Press.

Fredric John Warburg was a British publisher, who in 1935 founded the company Secker & Warburg. He is best known for his association with the author George Orwell. During a career spanning a large part of the 20th century and ending in 1971, Warburg published Orwell's major books Animal Farm (1945) and Nineteen Eighty-Four (1949), as well as works by other leading figures such as Thomas Mann and Franz Kafka. Other notable publications included The Third Eye by Lobsang Rampa, Pierre Boulle's The Bridge over the River Kwai, Adolf Hitler's Mein Kampf and William Shirer's The Rise and Fall of the Third Reich.