The title "Duke of Gästrikland" is a historical noble title in Sweden, associated with the province of Gästrikland. This region is located in the central part of Sweden and is known for its natural beauty, including forests and lakes. The title has been held by various members of the Swedish royal family throughout history. In the Swedish nobility system, dukes often held significant power and influence. The title of Duke of Gästrikland is currently held by Prince Carl Philip, a member of the Swedish royal family. The title reflects both a connection to the region and a ceremonial role within the Swedish monarchy.