James Henry Duncan (December 5, 1793 – February 8, 1869) was a member of the United States House of Representatives from Massachusetts. Born in Haverhill, Massachusetts, to James Duncan and his wife, Rebecca White, Duncan attended Phillips Exeter Academy, and graduated from Harvard University in 1812. He studied law and was admitted to the bar in 1815, commencing practice in Haverhill. He was an active militia officer, and attained the rank of colonel. He was president of the Essex Agricultural Society, and member of the Massachusetts House of Representatives in 1827, 1837, 1838, and again in 1857. He served in the Massachusetts State Senate from 1828 to 1831, and was a delegate to the Whig National Convention at Harrisburg, Pennsylvania, in 1839. He was appointed Commissioner-in-Bankruptcy in 1841. He was elected as a Whig to the Thirty-first and Thirty-second Congresses (March 4, 1849 – March 3, 1853). Following his political career he was engaged in the real-estate business. He died of pneumonia on February 8, 1869, in Haverhill, aged 75, and was interred in Linwood Cemetery. His daughter, Margaret, married Stephen Henry Phillips on October 3, 1871. James H. Duncan is the namesake of Duncan, Illinois. Personal life James married Mary Willis on June 26, 1826, in Haverhill, Massachusetts. They had 13 children together, 8 daughters and 5 sons: Rebekah White (died in infancy), James Henry, Benjamin Willis (died in infancy), Rebekah White, Mary Willis, George (died in childhood), Susan Reynolds, Samuel White, Rosanna, Elizabeth, George Willis, Caroline and Margaret. References External links 1793 births 1869 deaths Phillips Exeter Academy alumni Harvard University alumni Massachusetts lawyers Massachusetts state senators Members of the Massachusetts House of Representatives Politicians from Haverhill, Massachusetts Whig Party members of the United States House of Representatives from Massachusetts 19th-century American politicians 19th-century American lawyers