Ekenäs Castle (Ekenäs slott in Swedish) is a castle located outside Linköping in Linköping Municipality, Östergötland, Sweden. The castle consists of a three-story main building with a high steep roof and three square towers featuring Baroque tower domes. The present castle was built in the 17th century on top of the foundations of a medieval fortress from the 14th century. The lake surrounding the castle hill created a natural defense; however, this was drained in the late 19th century to create more arable land in the area.

Visitors are welcome year-round, however, the castle itself is only open during the summer. A jousting tournament and Medieval festival has been held here in May/June every year since 1993.