Marlborough is a town in Cheshire County, New Hampshire, United States.

[2] The town is home to the Kensan-Devan Wildlife Sanctuary at Meetinghouse Pond.

The primary settlement in town, where 1,066 people resided at the 2020 census, is defined as the Marlborough census-designated place (CDP) and is located at the junction of New Hampshire routes 101 and 124.

5" in 1752 by Governor Benning Wentworth, this was one of the fort towns originally known only by a number.

Stone from Marlborough quarries was used in buildings in Boston, at the College of the Holy Cross in Worcester, Massachusetts, and locally in the Frost Free Library.

The town's highest point is near its southeastern corner, on the side of Bigelow Hill, where the elevation reaches 1,516 feet (462 m) above sea level.