Duke of Teck

Coat of arms of the Dukes of Teck, Scheiblersches Wappenbuch, 1450–80

Duke of Teck (German: Herzog von Teck) is a title which was created twice in Germanic lands. It was first borne from 1187 to 1439 by the head of a cadet line of the German ducal House of Zähringen, known as the "first House of Teck". The seat of this territory was Castle Teck in the Duchy of Swabia (from 1512 part of the County of Württemberg).

The title was recreated in 1871 by King Charles I of Württemberg for his cousin Francis, who as the product of a morganatic marriage did not have a right to titles of nobility as a member of the House of Württemberg. His descendants settled in the United Kingdom and married into the British royal family.