Dummer, New Hampshire is a part of the Berlin, NH–VT micropolitan statistical area. The population was 283 in 2018. The town has a total area of 49.5 square miles, of which 48.2 square miles is land and 1.2 square miles is water. Great Northern Moose Lodge & Campground is a popular attraction in Dummer, NH. Pontook Reservoir (379 ac.) is located in Dummer.