Sandown is a town in Rockingham County, New Hampshire, United States.

Once part of Kingston, Sandown was incorporated as a separate town in 1756 by colonial governor Benning Wentworth.

It had an 11-foot-high (3.4 m) pulpit and marble columns supporting the gallery, and is still an excellent example of early New England church architecture.

Angle Pond, in the southeastern corner of the town, and Cub Pond, along Sandown's eastern border, drain east towards the Powwow River and are part of the Merrimack River watershed.

The highest point in Sandown is the summit of Hoyt Hill, at 505 feet (154 m) above sea level, near the town's southwestern corner.