James Madison Leach (January 17, 1815 – June 1, 1891) was a U.S. Representative from North Carolina.
Leach was born on his family's homestead, “Lansdowne”, in Randolph County, North Carolina, January 17, 1815. He attended the common schools and Caldwell Institute in Greensboro, North Carolina. He graduated from the United States Military Academy in 1838, studied law, and was admitted to the bar in 1842. Leach began his law practice in Lexington, North Carolina, and served in the State house of commons from 1848 to 1858.
Leach served as a presidential elector on the American Party ticket in 1856 and was elected as an Opposition Party candidate to the Thirty-sixth Congress (March 4, 1859 – March 3, 1861).
During the American Civil War, Leach served as a captain and lieutenant colonel of the 21st North Carolina Infantry in the Confederate Army. He saw action in many of the early campaigns of Stonewall Jackson, including the Valley Campaign. He served in the Army of Northern Virginia during the Peninsula Campaign and other battles, including the Battle of Gettysburg, where the regiment assaulted Cemetery Hill. He served as a member of the Confederate States Congress in 1864 and 1865.
He served as a member of the North Carolina State senate in 1865, 1866, and again in 1879 and was elected as a Democrat to the Forty-second and Forty-third Congresses (March 4, 1871 – March 3, 1875).
Leach died in Lexington, North Carolina on June 1, 1891, and is interred in Hopewell Cemetery, near Trinity, North Carolina.