Thompson and Meserve's Purchase is a township in Coös County, New Hampshire, United States.

The highest point in the purchase is 6,000 feet (1,800 m) above sea level on the slope of Chandler Ridge, just north of the summit of Mount Washington.

To the east of the Presidential peaks lies the Great Gulf, a deep glacial cirque.

According to the United States Census Bureau, the purchase has a total area of 18.5 square miles (48.0 km2), of which 0.3 acres (1,239 m2), or 0.003%, are water.

[1] The west side of the purchase is drained by the headwaters of the Ammonoosuc River, including its tributaries Clay Brook and Jefferson Brook, while the northwest corner of the purchase is drained by streams that flow north to the Israel River.