Thomas O’Brien, Tom O’Brien, or Tommy O'Brien may refer to:
Politicians
- Thomas C. O'Brien (1887–1951), American politician and lawyer
- Thomas J. O'Brien (Illinois politician) (1878–1964), Illinois politician
- Thomas J. O'Brien (Massachusetts politician) (contemporary), Massachusetts State Representative
- Thomas J. O'Brien (Michigan politician) (1842–1933), Michigan politician and U.S. ambassador
- Thomas P. O'Brien (born 1960), former United States Attorney for the Central District of California
- Sir Tom O'Brien (trade unionist) (1900–1970), British trade unionist and Member of Parliament
Sportspeople
- Thomas O'Brien (footballer) (born 1991), Scottish footballer
- Tom O'Brien (American football) (born 1948), former American college football coach at NC State
- Tom O'Brien (footballer, born 1889) (1889–1963), Australian rules footballer for University
- Tom O'Brien (footballer, born 1904) (1904–1983), Australian rules footballer for Melbourne
- Tom O'Brien (jockey) (born 1986), Irish jockey
- Tom O'Brien (outfielder) (1873–1901), Major League Baseball outfielder/infielder
- Tom O'Brien (second baseman) (1860–1921), baseball player
- Tommy O'Brien (baseball) (1918–1978), Major League Baseball outfielder
- Tommy O'Brien (rugby union), Irish rugby union player
- Tommy O'Brien (basketball), American basketball player
Others
- Thomas O'Brien (bishop) (1792–1874), Church of Ireland Bishop of Ossory, Ferns, and Leighlin
- Thomas O'Brien (interior designer) (born 1961), American designer
- Thomas D. O'Brien (1859–1935), co-founder of William Mitchell College of Law
- Thomas J. O'Brien (bishop) (1935-2018), Bishop of Phoenix, 1982–2003
- Thomas W. O'Brien (1859–1916), Canadian entrepreneur and pioneer
- Thomas Alexander O'Brien (1888–1948), New Zealand cinema owner and entrepreneur
- Tom O'Brien (actor, born 1890) (1890-1947), American film actor
- Tom O'Brien (actor) (born 1965), American film actor
- Tom O'Brien (swindler) (1851–1904), American confidence man and swindler
Topics referred to by the same termThis disambiguation page lists articles about people with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: