Grand Ayatollah Muhammad Taghi Bahjat Foumani (b. 1913, Fouman, Gilan Province, Iran, d. 2009 Qom, Iran) was an Iranian Twelver Shi'a Marja. He completed his studies under Ayatollah Taleghani and Ayatollah Naeini in Najf, Iraq. He was also a student of Abul Hasan Isfahani and Mirza Naini, then went on to teach at the seminary of Qom, Iran. It is said that he had deep knowledge in mysticism (Ilme Irfan).