Theodoros Diligiannis, also spelled Deligiannis, Delyannis, Delijannis and Deliyannis, (Greek: Te?d???? ???????????, 2 January 1820 – 13 June 1905), was a Greek politician, minister and member of the Greek Parliament, who served as Prime Minister of Greece five times from 1885 to 1905.
He led the National Party, which, along with the New Party, led by his primary political opponent, Charilaos Trikoupis, formed the two-party system of the time.