Margëlliç Castle (Albanian: Kalaja e Margëlliçit) is a castle in the village of Margëlliç near Patos, western Albania. It is a castle that dates from the 7th century AD and is found on top of a hill. The castle was part of the defence system of the ancient city of Byllis. The castle has also been the scene of a World War II battle between the Wehrmacht and Albanian Partisans.