The Signer's House and Matthew Thornton Cemetery are a pair of historic properties in Merrimack, New Hampshire, United States.

It consists of a house, once owned by Matthew Thornton, a signer of the United States Declaration of Independence, and the adjacent cemetery in which he is buried.

He refused an order to call out his regiment for the battles of Lexington and Concord, and on the night of April 20, 1775, left Merrimack for Boston within the British lines, leaving ownership to his mother Sarah, who remained.

[3] Sarah appealed for and was granted restoration of the ferry rights on October 24, 1775, and held them until her death September 7, 1778, aged 77 years.

On April 14, 1784, records show Thornton needed to petition for reinstatement of ferry rights which again had been confiscated by the town upon the occasion of Sarah's death.