Bethlehem is a hillside town in Grafton County, New Hampshire, United States. The population was 2,484 at the 2020 census. It is home to Cushman and Strawberry Hill state forests. The eastern half of the town is within the White Mountain National Forest. The Appalachian Trail crosses a small portion of the town in the south.

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.