List of Famous people with last name O-leary

Michael O'Leary was an Irish judge, politician and barrister who served as a Judge of the District Court from 1997 to 2006, Tánaiste and Minister for Energy from 1981 to 1982, Leader of the Labour Party from 1981 to 1982 and Minister for Labour from 1973 to 1977. He served as a Teachta Dála (TD) from 1965 to 1977, 1981 to 1982 and 1982 to 1987. He was a Member of the European Parliament (MEP) from 1979 to 1984.

John O'Leary was an Irish republican and a leading Fenian. He studied both law and medicine but did not take a degree and for his involvement in the Irish Republican Brotherhood he was imprisoned in England during the nineteenth century.

Jean O'Leary was an American lesbian and gay rights activist. She was the founder of Lesbian Feminist Liberation, one of the first lesbian activist groups in the women's movement, and an early member and co-director of the National Gay and Lesbian Task Force. She co-founded National Coming Out Day.