Capital (and largest city) Dhaka 23°42′N 90°21′E ﻿ / ﻿ 23.7°N 90.35°E ﻿ / 23.7; 90.35 Official language(s) Bengali Demonym Bangladeshi Government Unitary state and parliamentary democracy [ 1 ] - President Zillur Rahman - Prime Minister Sheikh Hasina Wazed - Speaker Ad.Abdul Hamid Independence from Pakistan - Declared March 26, 1971