Sandwich is a town in Carroll County, New Hampshire, United States. Its population was 1,466 at the 2020 census. Sandwich includes the villages of Center Sandwich and North Sandwich. Part of the White Mountain National Forest is in the north, and part of Squam Lake is in the southwestern corner of the town. As such, Sandwich lies on the boundary between New Hampshire's Lakes Region and White Mountains Region. The Sandwich Range of the White Mountains lies partially within the town, as does the namesake Sandwich Mountain. The town is home to the Sandwich Fair, a popular agricultural fair that occurs every October.
Chartered in 1763 by colonial Governor Benning Wentworth, the land was considered so inaccessible that the grant was enlarged, making Sandwich one of the largest towns in the state. It was named in honor of John Montagu, 4th Earl of Sandwich, said to be the inventor of the sandwich.
The earliest European settlers arrived in 1767.