John Jay (June 23, 1817 – May 5, 1894) was an American lawyer and diplomat to Austria-Hungary, serving 1869–1875. He was the son of William Jay and a grandson of Chief Justice John Jay of the United States Supreme Court. Jay was active in the anti-slavery movement, elected president of the New York Young Men's Antislavery Society while still in college. He published several speeches and pamphlets on slavery and history, and was elected in 1889 as president of the American Historical Association.