Wentworth is a town in Grafton County, New Hampshire, United States. The population was 845 at the 2020 census, down from 911 at the 2010 census. The town is home to Plummer's Ledge Natural Area, and part of the White Mountain National Forest is in the northeast. The town has a picturesque common, presided over by a Federal-style church and bordered by antique homes.

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.