Dainmarwa is a village in Ramnagar tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Dainmarwa was 7,671 which includes 3,951 males and 3,720 females. Dainmarwa covers 644 ha area. Pincode of Dainmarwa is 845103.