Sir Adam Nicholas Ridley (born 14 May 1942) is a British economist, civil servant, and banker.
After working at the Foreign Office and the Department of Economic Affairs, he was Director of the Conservative Research Department. With Chris Patten he wrote the Conservative election manifesto of 1979 and after the election was a Special Advisor to the Chancellors of the Exchequer until 1984. He later served as a director of Hambros Bank, of Morgan Stanley, and of Equitas insurance companies.