The Duke of Uppland is a historical title in Sweden, traditionally held by the heir apparent to the Swedish throne. This title has significant cultural and ceremonial importance, often associated with the royal family. The title dates back to the medieval period and is linked to the region of Uppland, which is located in eastern Sweden. The title is not only a mark of nobility but also carries responsibilities, including representing the monarchy at various events. The current holder of the title is typically the eldest son of the reigning monarch, making it a key part of the Swedish royal lineage and heritage.