Sumer Pathar is a village in Donka tehsil in district of Karbi Anglong, Assam, India. As per the data provided by Census of India in 2011, total population of Sumer Pathar was 558 which includes 285 males and 273 females. Sumer Pathar covers 549 ha area. Pincode of Sumer Pathar is 782496.