Conor Alexander Maguire (16 December 1889 – 26 September 1971) was an Irish politician, lawyer and judge who served as Chief Justice of Ireland from 1946 to 1961, a Judge of the Supreme Court from 1946 to 1961, President of the High Court, a Judge of the High Court from 1936 to 1946 and Attorney General of Ireland from March 1932 to November 1932. He served as a Teachta Dála (TD) for the National University of Ireland constituency from 1932 to 1936.

Maguire was born in Claremorris, County Mayo, in 1889.^[1] He was educated at Clongowes Wood College and University College Dublin (UCD). At UCD, he was a founding member of the Legal and Economic Society (now known as the University College Dublin Law Society) in 1911.

He then returned to County Mayo, where he practised as a barrister and was instrumental in establishing Ireland's first working Republican Courts, which usurped the existing courts, and created a forum to try offenders, resolve grievances and adjudicate on land issues.^[2]

He was first elected to Dáil Éireann as a Fianna Fáil TD for the National University constituency at the 1932 general election and was re-elected at the 1933 general election.^[3] He was appointed as Attorney General of the Irish Free State in March 1932.^[4] In November 1936, he resigned as Attorney General and as a TD on his appointment as President of the High Court and a Judge of the High Court.^[5] In 1946, he was appointed as Chief Justice of Ireland, that is the president of the Supreme Court of Ireland, where he served until 1961.^[1]