Henry Clay, Jr. (April 10, 1811 – February 23, 1847) was an American politician and soldier from Kentucky, the third son of US Senator and Congressman Henry Clay and Lucretia Hart Clay. He was elected to the Kentucky House of Representatives in 1835 and served one term. A graduate of West Point, he served in the Mexican-American War and was killed in 1847 at the Battle of Buena Vista.