William Green Jr. may refer to:
William Green Jr. (chaplain), Chief of Chaplains of the United States Army, 2023–2026 William J. Green Jr. (1910–1963), Democratic member of the U.S. House of Representatives from Pennsylvania, 1949–1963 William R. Green Jr. (1889–1966), judge of the United States Board of Tax Appeals (later the United States Tax Court), 1925–1929
See also William Green (disambiguation)