[3][4][5] Ershad was born in 1983 to a Bengali Muslim family in Bangladesh with ancestral roots in Dinhata (present-day India).
His paternal grandfather, Maqbul Hossain, was a lawyer and served as a minister of the erstwhile Maharaja of Cooch Behar.
[8] After the death of his father, Hussain Muhammad Ershad, on 14 July 2019, the Rangpur-3 constituency became vacant.
[13] On 16 September, Rezaul Karim Razu of Bangladesh Awami League withdrew his nomination paper and Ershad was declared as the candidate of Grand Alliance in the by-poll.
[14] He was elected on 5 October at by-election, defeating his cousin Hossain Mokbul Shahriar.