Salahpur Lagma is a village in Ghanshyampur tehsil in district of Darbhanga, Bihar, India. As per the data provided by Census of India in 2011, total population of Salahpur Lagma was 7,224 which includes 3,719 males and 3,505 females. Salahpur Lagma covers 766.37 ha area. Pincode of Salahpur Lagma is 847427.