Bath is a town in Grafton County, New Hampshire, United States. The population was 1,077 at the 2020 census, unchanged from the 2010 census. Now a tourist destination and commuter town for Littleton, the town is noted for its historic architecture, including the Brick Store and three covered bridges. Bath includes the village of Swiftwater and part of the district known as Mountain Lakes.

Grafton County is a county in the U.S. state of New Hampshire. As of the 2020 census, the population was 91,118. Its county seat is the town of Haverhill. In 1972, the county courthouse and other offices were moved from Woodsville, a larger village within the town of Haverhill, to North Haverhill.