The 1st Massachusetts Regiment was an infantry unit of the Continental Army that fought during the American Revolutionary War.
The regiment was adopted into the main Continental Army on 14 June 1775 and was assigned to William Heath's brigade on 22 July 1775.
On 24 January 1776 the regiment was reassigned to an unnamed brigade in the main Continental Army.
On 26 November 1776 the regiment was reassigned to St. Clair's Brigade of the main Continental Army.
On 1 January 1781 the regiment was reassigned to the 1st Massachusetts Brigade in the Highland Department and was disbanded on 3 November 1783 at West Point, New York.