Benjamin Lincoln (January 24, 1733 (O.S. January 13, 1733) – May 9, 1810) was an American army officer. He served as a major general in the Continental Army during the American Revolutionary War. Lincoln was involved in three major surrenders during the war: his participation in the Battles of Saratoga (sustaining a wound shortly afterward) contributed to John Burgoyne's surrender of a British army, he oversaw the largest American surrender of the war at the 1780 siege of Charleston, and, as George Washington's second in command, he formally accepted the British surrender at Yorktown.

Lincoln served from 1781 to 1783 as the first United States Secretary of War. While Secretary of War, Lincoln became an original member of The Society of the Cincinnati of the state of Massachusetts and was elected as the first president of the Massachusetts Society on June 9, 1783. After the war, Lincoln was active in politics in his native Massachusetts, running several times for lieutenant governor but only winning one term in that office. In 1787, Lincoln led a militia army (privately funded by Massachusetts merchants) in the suppression of Shays's Rebellion, and was a strong supporter of the new United States Constitution. He was for many of his later years the politically influential customs collector of the Port of Boston.

Benjamin Lincoln was born on January 24, 1733, in Hingham, Province of Massachusetts Bay, the sixth child and first son of Colonel Benjamin Lincoln and his second wife Elizabeth Thaxter Lincoln. Lincoln's ancestors were among those who first settled in Hingham, beginning with Thomas Lincoln 'the cooper,' who was among several Lincolns who settled in Hingham when it was part of the Massachusetts Bay Colony. Lincoln's father, one of the wealthiest men in Suffolk County, served as a member of the governor's council from 1753 until 1770, and occupied many other civic posts before his death in 1771. Lincoln's maternal grandfather, Col. Samuel Thaxter, one of the most prominent and influential citizens in Hingham, became Colonel in a regiment and one of those commissioned to settle the boundary between Massachusetts and Rhode Island in 1719.

In his early life, Lincoln worked on the family farm, and attended the local school. He followed his father into government, becoming town constable at 21, and in 1755 he joined the 3rd Regiment of the Suffolk County militia (where his father was colonel) as an adjutant. In 1756, at the age of 23, Lincoln married Mary Cushing, daughter of Elijah Cushing of Pembroke, Massachusetts, whose ancestors were also among the founders of Hingham. They had eleven children, seven of whom survived to adulthood. In 1757, he was elected the town clerk of Hingham, a post he held for twenty years. He continued to be active in the militia during the French and Indian War, but saw no action, and was promoted to major by the end of the conflict in 1763.

Lincoln was elected a Hingham town selectman in 1765, a post to which he held for six years. During this tenure political opposition rose in the province to Parliamentary tax measures, polarizing the political landscape of the colony. Lincoln sided with the opposition, eventually becoming a leading force among Hingham's Patriots. In 1770, in a list of resolutions passed by the inhabitants of Hingham, Lincoln outlined the measures urged by residents towards the non-importation of British goods, and he condemned the Boston Massacre. In 1772, Lincoln was promoted to lieutenant colonel of the 3rd Regiment of the Suffolk militia. That same year he won election as a representative of the town to the provincial assembly.

With the arrival of General Thomas Gage as governor of the colony in 1774, the provincial assembly was dissolved, but reformed itself into the Massachusetts Provincial Congress. Lincoln continued to win election to this body, and was placed on committees overseeing militia organization and supply, a position that came to be of utmost importance when the American Revolutionary War broke out with the Battles of Lexington and Concord in April 1775. He was then appointed to the congress' committee of safety, and also was elected to its executive council, which exercised executive authority over the province outside besieged Boston. He was deeply involved in ensuring that supplies of all sorts reached the nascent Continental Army outside Boston, procuring supplies from blankets to gunpowder.

In January 1776, Lincoln was promoted to major general of the Massachusetts militia, overseeing the coastal defenses of the state. After the British evacuated Boston, he and Continental Army General Artemas Ward oversaw attempts to improve the state's coastal fortifications, and he was ordered to hold the state's militia brigades in readiness in case the British returned. In May 1776 he directed the state forces that successfully drove the last Royal Navy ships from Boston Harbor.

Despite his lack of combat experience, Lincoln began lobbying state representatives to the Continental Congress for a Continental Army officers commission, anticipating that the aging and ill General Ward might soon step down. The idea was generally well received, with one representative writing that Lincoln was "a good man for a Brigadier General" and "a man of abilities", even though he had not "had much experience". While a Continental commission was not immediately forthcoming, Lincoln was placed in command of a brigade of militia the state sent to join General George Washington at New York Town in September 1776.