Success is an unincorporated township in Coös County, New Hampshire, United States. It is located directly to the east of the city of Berlin, and borders on the state of Maine. Success is part of the Berlin, NH-VT Micropolitan Statistical Area.
As of the 2020 census, the township had a population of four.
Geography
According to the United States Census Bureau, the township has a total area of , of which are land and , or 0.91%, are water.
As of the 2010 census, there were no people living in the township, although there are a number of summer homes mainly on the shores around Success Pond.