William O'Brien (6 March 1918 – 5 November 1994) was a Fine Gael politician from County Limerick, Ireland.
He was a senator from 1969 to 1977, and then a TD for Limerick West from 1977 to 1987.
[1] Before entering politics, O'Brien was an employee of CIÉ, the state-run Irish transport company.
[1] He stood unsuccessfully as a Fine Gael candidate for Dáil Éireann in the Limerick West constituency at the 1969 and 1973 general elections before winning the seat at the 1977 general election.
He did not contest the 1987 general election, and retired from politics.