James Lusk Alcorn (November 4, 1816 - December 19, 1894) was a prominent political figure in Mississippi during the 19th century. He served in the state house of representatives and senate during the 1840's and 1850's. During the American Civil War, he rose to the rank of general in the Confederate Army by war's end. He later served as Republican Governor from 1870-1871, resigned to become U.S. Senator (1871-1877).

Alcorn County, Mississippi is named in his honor.