Presley Underwood Ewing (September 1, 1822 – September 27, 1854) was a U.S. Representative from Kentucky. Born in Russellville, Kentucky, Ewing attended the public schools.He completed preparatory studies.He was graduated from Centre College, Danville, Kentucky, in 1840 and from the law school of Transylvania University, Lexington, Kentucky, in 1843.He studied theology at the Baptist Seminary at Newton, Massachusetts, in 1845 and 1846.He returned to Kentucky and practiced law in Russellville.He served as member of the Kentucky House of Representatives in 1848 and 1849.