Rashkan Castle (Persian: دژ رشکان, romanized: Dež Rashkan) was a castle in Tehran Province in northern Iran.

It was located near Cheshmeh Ali, Shah-Abdol-Azim shrine and Fath Ali shah inscription (Cheshmeh-Ali).

It was built during the Parthian rule of Iran.

The name comes from Arsaces I of Parthia, the first king of the Parthians.

Some of the war items found there are now housed in the National Museum of Iran.