Baht Simar is a village in Rajnagar tehsil in district of Madhubani, Bihar, India. As per the data provided by Census of India in 2011, total population of Baht Simar was 7,376 which includes 3,872 males and 3,504 females. Baht Simar covers 680.3 ha area. Pincode of Baht Simar is 847211.