Siahkal (Persian: سياهكل, also Romanized as Sīāhkal, Seyāh Kal, Sīāh Kal, and Sīyāh Kal; also known as Sīāhkal Maḩalleh) is a city in and the capital of Siahkal County, Gilan Province, Iran. At the 2006 census, its population was 15,274, in 4,343 families.