Justice Ryan may refer to:
Edward George Ryan (1810–1880), chief justice of the Wisconsin Supreme Court Elmer W. Ryan (1902–1980), associate justice of the Connecticut Supreme Court Howard C. Ryan (1916–2008), chief justice of the Illinois Supreme Court James L. Ryan (born 1932), associate justice of the Michigan Supreme Court Michael D. Ryan (1945–2012), associate justice of the Arizona Supreme Court Sean Ryan (judge) (born 1948), judge of the Irish High Court
See also Judge Ryan (disambiguation)