Mohammad Taqi Mirza Hessam os-Saltaneh (Persian: محمدتقی‌میرزا حسام‌السلطنه; 5 October 1791 – 1853) was an Iranian Prince of the Qajar dynasty, son of Fath-Ali Shah.

Mohammad Taqi Mirza (also written Mohammad Taghi Mirza) was born 5 October 1791 in Tehran as Fath-Ali Shah's 7th son by the latter's temporary (sighe) wife Zeynab Khanom, daughter of Ali Mardan Khan Bakhtiari, supreme chief of the Chahar Lang division of the Bakhtiari tribe.

Thus, he was one of the shah's twelve senior sons attending the official receptions at court depicted in several portraits.

In 1818 he commanded the attack on the Castle of Shirvan and his father, the shah, entitled him Hessam os-Saltaneh (lit.

At his father's death in 1834 he was with some brothers imprisoned in the Ardabil citadel by the prime minister to avoid any attempts against the succession of the princes' nephew Mohammad Shah Qajar.