Judge O'Malley may refer to:

Edward Loughlin O'Malley (1842–1932), judge of various British colonies Edward R. O'Malley (1863–1935), justice of the New York Supreme Court Iseult O'Malley (born 1964), judge of the Supreme Court of Ireland Kathleen M. O'Malley (born 1956), judge of the United States Court of Appeals for the Federal Circuit Katie O'Malley (born 1962), Baltimore City District Court judge Mart O'Malley (1890–1972), justice of the Indiana Supreme Court