Shajahan Siraj (1 March 1943 – 14 July 2020) was a Bangladeshi politician. He was the vice chairman of the Bangladesh Nationalist Party (BNP). He was one of the founders of Jatiya Samajtantrik Dal. He was the member of parliament for the Tangail-4 unit from 1986 to 1991. He was arrested in 2007 for tax evasion. 