The Ninth Fort (Lithuanian: Devintas Fortas) is a stronghold in the northern part of Šilainiai elderate, Kaunas, Lithuania. It is a part of the Kaunas Fortress, which was constructed in the late 19th century. During the occupation of Kaunas and the rest of Lithuania by the Soviet Union, the fort was used as a prison and way-station for prisoners being transported to labour camps.