William Jay

William Jay may refer to:


 * William Jay (minister) (1769–1853), English nonconformist minister
 * William Jay (architect) (1792–1837), English architect who also worked in America, son of the minister
 * William Jay (jurist) (1789–1858), American reformer, jurist, and the son of Founding Father and first U.S. Supreme Court Chief Justice John Jay (1745–1829)
 * William Jay (Colonel) (died 1915), colonel in the US Army and vice president of the New York Herald