Siwaisinghpur is a village in Lakhnaur tehsil in district of Madhubani, Bihar, India. As per the data provided by Census of India in 2011, total population of Siwaisinghpur was 1,355 which includes 696 males and 659 females. Siwaisinghpur covers 82.2 ha area. Pincode of Siwaisinghpur is 847410.