Success is an unincorporated township located in Coos County, New Hampshire, USA. It is located directly to the east of the city of Berlin, New Hampshire, and borders on the state of Maine. Success is part of the Berlin, NH– VT Micropolitan Statistical Area.
As of the 2010 census, the township had a population of 0.  There are some seasonal homes, cabins, and cottages mainly located around Success Pond which gives the township a small seasonal population, though none of these homes are primary residences.
As of 2005, one of the larger landowners in Success is the Androscoggin Valley Regional Refuse Disposal District.
Success was granted in 1773 and contained about 90,472 acres (366.1 km2). The grantees were Benjamin Mackay and about seventy others.
The state of New Hampshire requires a nearby incorporated town to exercise the responsibilities that would fall to the Town of Success if it should be incorporated. Some towns in the state bearing such responsibility have sought to be relieved of it.[ citation needed]
A railroad was built by Blanchard and Twitchell Company in 1892 from the Boston and Maine Railroad in Berlin, New Hampshire, through the aboriginal forests to Success Pond in the northeast corner of the township. Six locomotives transported lumber and logs to Berlin sawmills over the 26-mile (42 km) railway.  Most of the Success township forests were gone within a decade, but the railway operated after 1904 as the George W. Blanchard and Sons Company Railroad. Boston and Maine kept 1,600 feet (490 m) of interchange track in service when the remainder of the railroad was dismantled in 1907. 
According to the United States Census Bureau, the township has a total area of 57.0 square miles (147.6 km2), of which 56.5 square miles (146.3 km2) is land and 0.5 square miles (1.3 km2), or 0.91%, is water. 
|U.S. Decennial Census |
- United States Census Bureau, American FactFinder, 2010 Census figures. Retrieved March 23, 2011.
- "New Hampshire Logging Railroad List". W. George Cook. Retrieved 2012-01-24.
- "Maine Logging Railroads". American-Rails. Retrieved 2012-01-24.
- "Geographic Identifiers: 2010 Demographic Profile Data (G001) - Success township, New Hampshire". U.S. Census Bureau American Factfinder. Retrieved November 9, 2011.
- "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2015". Archived from the original on July 14, 2016. Retrieved July 2, 2016.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2016.