The Ninth Fort (Lithuanian: Devintas Fortas) is a stronghold in the northern part of Šilainiai elderate, Kaunas, Lithuania.

During the Soviet occupation in 1940–1941, the Ninth Fort was used by the NKVD to house political prisoners pending transfer to Gulag forced labor camps.

In addition, Jews from as far as France, Austria and Germany were brought to Kaunas during the Nazi occupation, and executed in the Ninth Fort.

In 1943, the Germans operated special Jewish squads to dig mass graves and burn the remaining corpses.

The mass burial place of the victims of the massacres carried out in the fort is a grass field, marked by a simple yet frankly worded memorial written in several languages.