William O'Brien (1852–1928) was an Irish journalist and politician. William O'Brien may also refer to: Other politicians William O'Brien, 2nd Earl of Inchiquin (c. 1640–1692), Governor of Jamaica William O'Brien (Australian politician) (1882–1953), New South Wales politician William O'Brien (Fine Gael politician) (1918–1994), Irish Fine Gael TD and Senator from County Limerick William O'Brien (Minnesota politician) (1930–2007), American politician William O'Brien (Nova Scotia politician) (1782–1854), political figure in Nova Scotia William O'Brien (Rhode Island politician) (born 1969), American state legislator in Rhode Island William O'Brien (trade unionist) (1881–1968), Irish Labour TD and trade union leader William Edward O'Brien (1831–1914), lawyer, farmer, editor and political figure in Ontario, Canada William H. O'Brien (1871–?), Wisconsin state assemblyman William J. O'Brien (politician) (1836–1905), United States Representative from Maryland, 1873–1877 William L. O'Brien (born 1951), former Speaker of the New Hampshire House of Representatives William Smith O'Brien (1803–1864), Irish Conservative and Repeal MP and Young Ireland revolutionary William Smith O'Brien (American politician) (1862–1948), U.S. Representative from West Virginia Bill O'Brien (British politician) (born 1929), British Labour MP for Normanton, 1983–2005 Billy O'Brien (politician) (1929–2012), American politician in the Virginia House of Delegates In sports William O'Brien (American football) (1923–2000), head football coach for the Southern Illinois Salukis William O'Brien (footballer), Scottish footballer William O'Brien (racing driver) (born 1951), American racing driver Parry O'Brien (William Patrick O'Brien, 1932–2007), American shot-put innovator William O'Brien, National League baseball umpire in 1876 Willie O'Brien (born 1929), English footballer Bill O'Brien (American football) (born 1969), American football coach Bill O'Brien (footballer, born 1877) (1877–1942), Australian rules footballer for Collingwood Bill O'Brien (footballer, born 1887) (1887–1943), Australian rules footballer for St Kilda Bill O'Brien (footballer, born 1905) (1905–1988), Australian rules footballer for South Melbourne Billy O'Brien (baseball) (1860–1911), Major League Baseball first baseman Billy O'Brien (footballer) (born 1995), Welsh football goalkeeper Others William O'Brien, 2nd Marquess of Thomond (1765–1846), Irish peer William O'Brien, 3rd Earl of Inchiquin (1662–1719), Irish peer William O'Brien, 4th Earl of Inchiquin (1700–1777), founder of the Royal Cork Yacht Club in 1720 William O'Brien (actor) (1740–?), Irish actor in the company of David Garrick at Drury Lane William O'Brien (judge) (1832–1899), Irish judge William O'Brien (police officer) (1944–2016), American police officer William O'Brien (Royal Navy officer) (1916–2016), British admiral William O'Brien, President, BATS Global Markets Monsignor William B. O'Brien, founder and the president of the World Federation of Therapeutic Communities also co-founder of Daytop William David