When was Bangladesh founded? October 21, 2011 by Pamela Landy · Filed Under: World History Bangladesh was founded in 1971. Formerly East Bengal and then East Pakistan, it rebelled against Pakistan, with help from India in 197. Bangladesh was not recognized by Pakistan until 1974. Related PostsWho founded the city of Chicago?Who founded Hasidism?When was the NFL organized and founded?Who founded the Pinkerton Detective Agency?How old is the PLO and why was it founded?