Justice O'Connor may refer to:
Deirdre O'Connor (1941–2024), judge of the Federal Court of Australia Dennis O'Connor (judge) (fl. 1970s–2010s), associate chief justice of Ontario on the Ontario Court of Appeal Earl Eugene O'Connor (1922–1998), associate justice of the Kansas Supreme Court Kenneth O'Connor (1896–1985), chief justice of Jamaica and later of Kenya Maureen O'Connor (judge) (born 1951), chief justice of the Supreme Court of Ohio Richard Edward O'Connor (1851–1912), justice of the High Court of Australia Sandra Day O'Connor (1930–2023), associate justice of the United States Supreme Court
See also Judge O'Connor (disambiguation) Justice Connor (disambiguation)