Chak Saiyad Mahmud is a village in Mehsi tehsil in district of Purba Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Chak Saiyad Mahmud was 571 which includes 301 males and 270 females. Chak Saiyad Mahmud covers 25.47 ha area. Pincode of Chak Saiyad Mahmud is N/A.