The Qajar Palace () was the name of a Qajar era palace in Tehran, Iran. It was demolished in the 1920s to be replaced by the Qasr prison. The only remaining structure of the palace complex is a small pavilion.
It had four watchtowers on its corners and did not feature windows on the outside, making it look more like a barracks than a palace.
The palace was constructed in the second year of Fath-Ali Shah Qajar but fell out of use after his death. It was then used for military purposes during the reign of Naser al-Din Shah Qajar. In the 1920s, Reza Shah demolished and replaced it with the Qasr prison, Iran's first modern prison.
The palace was depicted by Eugène Flandin and Pascal Coste, two Frenchmen who travelled to Iran during the reign of Mohammad Shah Qajar.
The prison that replaced it became a museum in 2011.