Abijah Willard (27 July 1724 at Lancaster, Massachusetts – 28 May 1789 in Saint John, New Brunswick) was a soldier during the French and Indian War who wrote a journal during the Expulsion of the Acadians. During King George's War, he fought in the Siege of Louisbourg (1745). During the French and Indian War, he fought in the Battle of Fort Beauséjour.