8 May 1751–6 May 1839
In 1771 he married Ann Ballard of Halifax County and the following year their first child, Mary, was born. No longer able to support his family on the income of a teacher, Lenoir chose the more lucrative profession of surveying. In 1775, after mastering the new trade and deciding to seek opportunities in sparsely settled western North Carolina, he moved his small family to that part of Surry County that became Wilkes County in 1778.
Lenoir had barely established his new farm when the Revolutionary War erupted and he joined the Patriot cause by enrolling in the local militia. His ability to lead men caught the eye of his superiors, and in 1776 he received command of a ranger company that patrolled the Blue Ridge Mountains to defend white settlements against warring Indians. He also led troops in the Cherokee campaign of 1776 and four years later in the Battle of Kings Mountain, when he was wounded twice. In "Pyle's Massacre" of 1781 near the Haw River, Lenoir's horse was shot from under him and his sword was broken, but he escaped injury when the Patriot force overwhelmed an outnumbered Loyalist band. Throughout the war Captain Lenoir displayed a much-needed skill for assembling supplies and arms as well as recruiting soldiers.
Lenoir's affiliation with the state militia did not end with the Revolution. He encouraged regular musters to keep units of the Fifth North Carolina Division in readiness, especially during the early 1790s, when war between England and France threatened to involve America. Although Lenoir resigned from the military establishment in 1794 after being passed over for a division command in a statewide militia reorganization, he accepted in 1795 the commission of major general to take charge of the Fifth Division. Unwilling to rest on his laurels, he sought to strengthen the citizen army by pleading with state government officials for supplemental arms for his troops and for passage of stricter military regulations, and by encouraging better preparedness and self-discipline among his subordinates. In 1812 he mobilized over a thousand men to participate in America's second war with Great Britain, but his long military career ended with his resignation after he refused to serve under a despised political opponent.
Lenoir's leadership abilities during the Revolution gained him the necessary local support for an appointment in 1776 as a Wilkes County justice of the peace and in 1778 as the county's clerk of court. His dependability and fairness in exercising magistrate duties and his efficiency in performing court business impressed fellow justices and other county residents, who elected him to the North Carolina House of Commons in 1781. Lenoir served three terms in the house, won election to the state senate for the years 1784–85 and 1787–95, and was speaker of the senate during his last five terms. A delegate to the state ratifying conventions of 1788 and 1789, he voted against the U.S. Constitution because it did not contain a bill of rights. In 1789 he was designated a trustee of the newly chartered University of North Carolina and acted as president pro tem at the first meeting in 1790.
While continuing to serve as justice of the peace, Lenoir enjoyed considerable prosperity as a planter-entrepreneur. In addition to making money from the sale of crops grown on his plantation, Fort Defiance, he supplemented his income by operating a blacksmith shop, breeding horses, and lending money; he received revenue from idle acreage by leasing land to farmers whom he required to practice land conservation. Lenoir was successful in buying and selling his holdings of over 10,000 acres. But as a member of Rousseau and Company, he encountered difficulty during 1795–96 in managing the sale of over 100,000 acres of local land to Pennsylvania agents and received only a meager profit for the effort.
If Lenoir's land company endeavor was a financial fiasco and provided a political issue to help defeat him, his own acquisition of Moravian land in Wilkes County during the Revolutionary War was even more costly. Following the confiscation acts of 1777 and 1799 authorizing the expropriation of Loyalist property in North Carolina, he and county citizens claimed property held in trust for the Moravians of Forsyth (then Surry) County by a British citizen, Henry Cossart. In 1793 the Moravians entered a suit of ejectment against the Wilkes claimants, and the ensuing cases of Marshall v. Loveless and Others and Benzien and Others v. Lenoir and Others dragged through superior and state supreme courts for over thirty years. The tribunals ruled against the defendants, contending that Cossart's trust was valid and that as North Carolina citizens the Moravians were not subject to confiscation acts. As a result, Lenoir lost several thousand acres of land, over a thousand dollars in back rent, and a legal struggle that he considered to be a moral issue.
As a family man Lenoir was a loving father and a strict disciplinarian, enjoying obedience and respect from his nine children: Mary, William Ballard, Ann, Thomas, Elizabeth, Walter Raleigh, Eliza Mira, Martha, and Sarah Joyce. His wife Ann was considered by friends to be a woman of prudence, industry, and benevolence and lived with him almost "63 years in perfect tranquility" until her death in 1833. Surviving his wife by six years, the benevolent but impatient Lenoir faced death as he faced life—fighting. Even when the battle for his life appeared lost and the pain from terminal illness grew more intense, he remained composed and alert.
Lenoir was buried in the family cemetery at Fort Defiance. His contribution to North Carolina was recognized in the naming of a county, a town, a street in Raleigh, and a building at The University of North Carolina for him. His portrait hangs in South Building on the Chapel Hill campus. He was a Freemason.