Narayan Sanyal was born in Krishnagar to Chittasukh Sanyal and Basantalata Devi. His name was initially Narayandas Sanyal in school life.[2] His family consisted of wife Sabita Sanyal; elder daughter Anindita Basu, son-in-law Amitabha Basu, son Tirtharenu Sanyal, daughter-in-law Sharmila Sanyal, younger daughter Mou Sanyal Talukdar, son-in-law Soumitra Talukdar.

Although Sanyal is known mostly as a novelist, he was also an eminent civil engineer by profession. After graduating in science from the University of Calcutta, he passed Bachelor of Engineering from Bengal Engineering College in 1948. Thereafter he joined Public Works Department and later National Buildings Organisation, Ministry of Works and Housing, Eastern Region, Govt of India. He was a Fellow of the Institution of Engineers (India) and a Fellow of the Association of Engineers (India). He also wrote books in Civil Engineering such as Vaastu Vigyan.

A biography of Narayan Sanyal was written by Pradip Dutta – Ami Narayan Sanyal Ke Dekhechi.

A Documentary on Writer Narayan Sanyal was screened on the 18th Kolkata International Film Festival on 15 November 2012 at Bangla Academy . The film ” CHOKHER DEKHA PRANER KOTHA …. Narayan Sanyal ” in Bengali named by his elder son-in-law Amitabha basu, was directed by his younger son-in-law Soumitra Talukdar and produced by his younger daughter Mou Sanyal.