Bath is a town in Grafton County, New Hampshire. Its population at the 2010 census was 1,077. The town limits includes the village of Swiftwater and the Mountain Lakes.
The town had most productive soil as well as running water for power generation, thus facilitating both farming and industrial growth. Factories here included a woolen mill, creamery, distillery, sawmills, gristmills and two starch factories. The White Mountains Railroad up the Ammonoosuc River Valley opened August 1, 1853 for shipping industrial products. The Brick Store, built in 1824, is today the oldest continuously operating general store in the country.
The town is popular among tourists for its scenic beauty, the historic railroad center, as well as the historic architecture in other parts of the town. Efforts are on to restore parts of the town as well.