Bahman Mirza Baha od-Dowleh () was a Qajar prince and governor in Iran. He was the thirty-seventh son of Fath-Ali Shah Qajar ().
Born on 13 November 1811, he was the thirty-seventh son of Fath-Ali Shah Qajar (). His mother was Golbadan Baji, a former slave possibly of Georgian origin, who managed the household finances. Bahman Mirza's authority was restricted since he was Fath-Ali Shah's thirty-seventh son. In 1836, he was given the governorship of Kashan, replacing Abbasqoli Khan Mo'tamed od-Dowleh Javanshir. However, he was replaced in the same year by Mostafa-Qoli Khan Semnani.
In 1840, he was given the governorship of Yazd province, replacing his nephew Khanlar Mirza. In 1841/1842, a rebellion in the Kerman province was staged by Aga Khan I, the Imam of the Nizari Isma'ilis. The latter fled to Mehriz in Yazd due to being hunted by government forces. A force of Yazdi, Iraqi, and Shaqaqi soldiers, as well as two gun carriages, was assembled by Bahman Mirza. He attacked Aga Khan I in the village of Kalmand, but was defeated and returned to Yazd, while Aga Khan I returned to Kerman.
Bahman Mirza died during the reign of Naser al-Din Shah Qajar ().
Bahman Mirza had four sons and two daughters. His family maintained prominence and assumed the surname Jahansuz. His daughter Hajieh Homa Khanum was the wife of Qahraman Mirza and mother of Kioumars Mirza Amid od-Dowleh.