It is located directly to the east of the city of Berlin, and borders on the state of Maine.

As of 2005, one of the larger landowners in Success was the Androscoggin Valley Regional Refuse Disposal District.

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, as Cassius M. C. Twitchell had sold his interest in the business in 1901.

The Boston and Maine kept 1,600 feet (490 m) of interchange track in service when the remainder of the railroad was dismantled in 1907.

As of the 2010 census,[5] there were no people living in the township, although there are a number of summer homes mainly on the shores around Success Pond.