Humayun Azad (Bangla: হুমায়ূন আজাদ) was a Bangladeshi author and scholar. He earned BA degree in Bengali language and literature from University of Dhaka. He obtained his PhD in linguistics from the University of Edinburgh in 1976. He later served as a faculty member of the department of Bengali language and literature at the University of Dhaka. His early career produced works on Bengali linguistics, notably syntax. He was regarded as a leading linguist of the Bangla language.

Towards the end of 1980s, he started to write newspaper column focusing on contemporary socio-political issues. Through his writings of 1990s, he established himself as a freethinker and appeared to be an agnostic. In his works, he openly criticized religious extremism, as well as Islam. In 1992 Professor Azad published the first comprehensive feminist book in Bangla titled Naari (Woman), largely akin to The Second Sex by Simone de Beauvoir in contents and ideas.

The literary career of Humayun Azad started with poetry. However, his poems did not show any notable poetic fervour. On the other hand his literary essays, particularly those based on original research, carried significant value.

He earned a formidable reputation as a newspaper columnist towards the end of 1980s. His articles were merciless attacks on social and political injustice, hypocrisy and corruption. He was uncowed in protesting military rule. He started to write novels in 1990s. His novel Chappanno Hazar Borgomile is a powerful novel written against military dictatorship. Azad's writings indicate his distaste for corrupt politicians, abusive military rulers and fundamentalist Islam. Nevertheless, his prose shows a well-knit and compact style of his own. His formation of a sentence, choice of words and syntax are very characteristic of him. Although he often fell victim to the temptation of using fiction as a vehicle of conspicuous political and philosophical message, he distinguished himself with his unique style and diction.

On August 11, 2004, Professor Azad was found dead in his apartment in Munich, Germany, where he had arrived a week earlier to conduct research on the nineteenth century German romantic poet Heinrich Heine. He was buried in Rarhikhal, his village home in Bangladesh.

In 2012, the Government of Bangladesh honored him with Ekushey Padak posthumously. Besides this, he was honored with Bangla Academy Award in 1986.