William H. Allen

William H. Allen may refer to:
 * William H. Allen (politician) (c. 1851–?), member of the Mississippi House of Representatives
 * William H. Allen (architect) (1858–1936), American architect
 * W. H. Allen (artist) (1863–1943), British watercolor artist
 * William Henry Allen (1784–1813), American naval officer
 * William Henry Allen (artist) (1894 – 1988), British artist and printmaker
 * William Howard Allen (1790–1822), American naval officer