Ardashir II (Persian: اردشیر) was the ruler of the Bavand dynasty from 1238 to 1249. His grandmother was a sister of Rustam V, and he was also related to the Nizari Ismaili Jalaluddin Hasan through his mother.

In 1238, Ardashir restored Bavand rule in Mazandaran, and assumed the traditional Bavand title of ispahbadh. He died in 1249, and was succeeded by his son Muhammad.

• Madelung, W. (1984). "ĀL-E BĀVAND (BAVANDIDS)". Encyclopaedia Iranica, Vol. I, Fasc. 7. London u.a.: Routledge & Kegan Paul. pp. 747–753. ISBN 90-04-08114-3.
• Frye, R.N. (1975). "The Saljuq and Mongol periods". In Frye, R.N. (ed.). The Cambridge History of Iran, Volume 5: The Iranian world. Cambridge: Cambridge University Press. pp. 1–659. ISBN 0-521-20093-8.