Theodore Brentano (March 29, 1854 – July 2, 1940) was an American attorney and judge and the first U.S. ambassador to Hungary (his full title was Envoy Extraordinary and Minister Plenipotentiary). He was appointed to the position by Warren G. Harding. In 1899 Brentano became the new treasurer and president of the Illinois Staats-Zeitung, the newspaper of which his father was editor during the Civil War, when the majority stockholders appointed a new board of directors and ousted former treasurer Charles Francis Pietsch.