Grand Ayatollah Mirza Abd al-Hadi Husayni Shirazi (Persian: عبدالهادى حسينى شيرازى; Arabic: عبد الهادي الحسيني الشيرازي; 1882 – July 13, 1962) was an Iranian Shia marja' and poet.

[1][2][3] After the death of Abu al-Hasan Esfehani, Shirazi was considered to be one of the highest ranking scholars in Iraq, along with Muhsin al-Hakim (possibly higher ranking than al-Hakim)[4] and some less popular jurists like Muhammad-Husayn Kashif Ghitaa, Mahmoud Shahroudi, and Muhammad-Ridha Al Yasin.

He was one of the leading scholars that issued an anti-communist fatwa during the rise of the "red tide" in Iraq under Abd al-Karim Qasim.

His father was Mirza Ismail Shirazi, a mujtahid and poet, who fell ill and died a few months after his sons birth.

[8] Eventually, he began teaching in his home, until his voice rendered inaudible due to the number of people present in his class, so he relocated to the al-Turuk Mosque in the al-Huwaysh area.

[10] One of his most notable poems is about Abu Talib: أبو طالب حامي الحقيقة سيّد تزان به البطحاء في البر والبحر أبو طالب والخيل والليل واللوا له شهدت في ملتقى الحرب بالنصر أبو الأوصياء الغر عمّ محمّد تضوع به الأحساب عن طيب النجر Abu Talib, protector of the truth; the master, Equal to the Bathaa on land and sea.