Damak is one of the oldest municipalities in Jhapa District of Koshi Province in eastern Nepal. It is situated between the Ratuwa River in the east and the Maawa River in the west. It has Sivalik Hills in its north and ends with the intersection of Ratuwa River and Maawa River in the south. Mahendra Highway, the longest highway of Nepal, bisects the municipality. It is the largest city in Jhapa District with a population of 107,410 in 2021.