Mohammad Taqi Mirza Rokn ed-Dowleh () was an Iranian prince of the Qajar dynasty.
He was born in Tehran to Mohammad Shah Qajar before 13 February 1842 (s/o a Zainab Khanum) and was granted the title Rokn ed-Dowleh in 1868. He was governor of Tehran between 1856 and 1858, Khamseh 1866âÂÂ1867 and 1872âÂÂ1873, Zanjan 1876âÂÂ1878, Governor-General of Khorasan 1876, 1881, 1883âÂÂ1884, 1887âÂÂ1888 and 1897, of Fars 1892âÂÂ1893 and 1894âÂÂ1897, and of Arabistan 1897âÂÂ1901.
He received the decoration of the Imperial Portrait, and the Order of the Lion and Sun 1st class.
He died in 1901, having left behind eight sons and six daughters.