Abul Qasim Hasan Unsuri Balkhi (Persian: ابوالقاسم حسن عنصری بلخی) (died 1039/1040) was a 10-11th century Persian poet.
He is said to have been born in Balkh, today located in Afghanistan, and he eventually became a poet of the royal court, and was given the title Malik-us Shu'ara (King of Poets').
His Divan is said to have contained 30,000 distichs, of which only 2500 remain today.
- E.G. Browne. Literary History of Persia. (Four volumes, 2,256 pages, and twenty-five years in the writing). 1998. ISBN 0-7007-0406-X
- Jan Rypka, History of Iranian Literature. Reidel Publishing Company. 1968 OCLC 460598. ISBN 90-277-0143-1
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