Theodor Anton Blank (19 September 1905 – 14 May 1972) was a German politician of the CDU. He was one of the founders of the CDU in 1945. Blank was born in Elz an der Lahn. He was the third of ten children of a carpenter. His family was Roman Catholic. Blank received an apprenticeship as a carpenter. In 1930–33 he worked as a secretary at the Association of Christian transport- and factory employees of the northern and northwestern Ruhr Area. After he was dismissed in 1933 Blank passed his Abitur in 1936 and studied mathematics at the University of Münster and engineering sciences at Leibniz University Hannover. In 1939 he was conscripted to the Wehrmacht and became a first lieutenant at the end of World War II.