James K. Jones (born September 29, 1839 in Marshall County, Mississippi - died June 1, 1908 in Washington, DC) was a U.S. politician.
Born in Mississippi, Jones moved with his father to Dallas County, Arkansas in 1848. He pursued classical studies under a private tutor; he would later study law and was, in 1874, admitted to the bar, practicing in Washington, Arkansas.
During the American Civil War, Jones served in the Confederate Army, and returned to his Arkansas plantation afterward. From 1873 to 1879, he was a member of the Arkansas State Senate, and was president of that body from 1877 to 1879. In 1896 and 1890, he was the chairman of the Democratic National Committee.
Jones was elected as a Democrat to the forty-seventh and forty-eighth Congresses (March 4, 1881-March 3, 1885); he was reelected to the forty-ninth but tendered his resignation on February 19, 1885, having been elected to the United States Senate that year. Jones was reelected in 1891 and 1897 and served from March 4, 1885, to March 3, 1903, unsuccessfully seeking reelection in 1902. While in the Senate, he was Democratic caucus chairman from 1899 to 1903; chairman of the Committee on Indian Affairs (Fifty-third Congress), Committee on Corporations Organized in the District of Columbia (Fifty-fourth and Fifty-fifth Congresses), Committee on Private Land Claims (Fifty-fifth Congress.)
After his Congressional service, Jones resumed the practice of law in Washington, D.C., and died there June 1, 1908; he was buried in Rock Creek Cemetery.