Gogar Istamrar is a village in Dagarua tehsil in district of Purnia, Bihar, India. As per the data provided by Census of India in 2011, total population of Gogar Istamrar was 892 which includes 452 males and 440 females. Gogar Istamrar covers 87 ha area. Pincode of Gogar Istamrar is N/A.