Risto Heikki Ryti (; – ) was the fifth president of Finland, from 1940 to 1944. Ryti started his career as a politician in the field of economics and as a political background figure during the interwar period. He made a wide range of international contacts in the world of banking and within the framework of the League of Nations. Ryti served as prime minister during the Winter War and the Interim Peace. Later he served as president during the Continuation War. After the war, Ryti was the main defendant in the Finnish war-responsibility trials.