The Regiment was authorized on May 22, 1775 in the New Hampshire State troops as the 3rd New Hampshire Regiment. Organized between June 1-8, 1775 at Fitzwilliam to consist of 10 companies. From Cheshire, Hillsborough and Cumberland counties. Adopted on June 14, 1775 into the Continental Army and assigned to the Main Continental Army. It was assigned on July 22, 1775 to Sullivan's Brigade, an element of the Main Continental Army. It was assigned on July 20, 1776 to Stark's Brigade, an element of the Northern Department. Reorganized and re-designated on January 1, 1777 as the 3rd New Hampshire Regiment, to consist of 8 companies. It was assigned on April 28, 1777 to the New Hampshire Brigade, an element of the Northern Department. New Hampshire Brigade relieved on October 20, 1777 from the Northern Department and assigned to the Main Continental Army. Reorganized on December 23, 1778 to consist of 9 companies. Disbanded on January 1, 1781 at Continental Village, New York.