Who is the current Shah of Iran?

Currently in the Islamic Republic of Iran, there is no Shah.

The last ruling Shah of Iran (Mohammed Reza Pahlavi) was forced into exile in 1979 and died in 1980. His son Reza Pahlavi II is the heir to the Persian throne, but does not carry the title of Shah since he does not actually rule anything; he is a Pretender to the Throne.