Chatham is a town in Carroll County, New Hampshire, United States.

Chatham was granted to Peter Livins and others on February 7, 1767,[3] by colonial Governor Benning Wentworth.

Chatham was regranted in 1770 by his nephew, Governor John Wentworth, to a group including Samuel Langdon, president of Harvard College and creator of the "Blanchard Map" of the North Country.

[1] The highest point in Chatham is the summit of South Baldface, with an elevation of 3,547 feet (1,081 m) above sea level.

[4] An article in Statistics and Gazetteer of New-Hampshire (1875) stated, "Carter's Mountain rises so high between this town and Jackson as to prevent the opening of a highway, and the people of the respective towns, in their intercourse, are obliged to pass through a portion of Maine.

Kiarsarge [sic], in the south-west corner of the town, has...upon the summit...a commodious house for the accommodation of visitors.

Chatham is a pene-enclave, functionally accessible to neighboring New Hampshire towns only by traveling through Maine first.