John Michael O'Dea AM, KCSG (born 11 November 1938) is an Australian solicitor and former local government politician who served as an alderman and mayor of the Municipality of North Sydney. O'Dea was a solicitor with Carroll & O’Dea Lawyers from 1960 and was a partner from 1963 until his retirement in 2006. He is the father of the Speaker of the NSW Legislative Assembly, Jonathan O'Dea.