Bernard John Maguire was an Irish politician, farmer and company director. Maguire stood unsuccessfully for election at the June 1927 general election. He was first elected to Dáil Éireann as a Fianna Fáil Teachta Dála (TD) for the Leitrim–Sligo constituency at the September 1927 general election. He was re-elected for the same constituency at the 1932 and 1933 general elections. At the 1937 general election he was elected for the Leitrim constituency and was re-elected for this constituency at the 1938 general election.