Hasnain is a masculine given name and surname of Arabic origin. Notable people with the name include:
Given name Hasnain Akhtar, Pakistani snooker player Hasnain Gulamabbas Dewji (born 1957), Member of Parliament in the National Assembly of Tanzania Hasnain Kazim (born 1974), German journalist Hasnain Khan (born 1996), Pakistani cricketer
Surname Belum Hasnain, Pakistani politician Constance J. Chang-Hasnain (born 1960), American electrical engineer, and John R. Whinnery Chair Professor at University of California, Berkeley Maisam Hasnain (born 1977), former Pakistani cricketer Mohammad Hasnain (born 2000), Pakistani cricketer Syed Ata Hasnain, Indian Army General officer Seyed E. Hasnain (born 1954), distinguished Professor of Biological Sciences at the Indian Institute of Technology, Delhi, India Syed Mahdi Hasnain, general in the Indian Army Golam Hasnayen (1929–2021), Bangladeshi lawyer and activist