Thomas or Tom Brennan may refer to:
Thomas Brennan (Irish Land League) (1853–1912), Irish politician Thomas Brennan (Fianna Fáil politician) (1886–1953), Irish politician Thomas Brennan (Victorian state politician) (1900–1966), Victorian state MP Thomas Brennan (footballer) (1911–?), Scottish professional footballer Thomas Brennan (equestrian) (1940–2014), Irish equestrian Thomas E. Brennan (1929–2018), American jurist, Chief Justice of the Michigan Supreme Court Thomas Francis Brennan (1855–1916), American Catholic bishop; 1st Catholic bishop of Dallas 1891–1893 Tom Brennan (politician) (1866–1944), Australian Senator Tom Brennan (basketball, born 1930) (1930–1990), basketball player for Villanova University and the Philadelphia Warriors Tom Brennan (basketball, born 1949) (born 1949), American sportscaster and former University of Vermont basketball coach Tom Brennan (baseball) (born 1952), 1980s baseball player Tom Brennan (civil servant) (1928–2013), Oklahoma civil servant and businessman Tom Brennan (footballer), English soccer player Tom Brennan (ice hockey) (1922–2003), American ice hockey player for Boston Bruins Tom Brennan (speedway rider) (born 2001), British speedway rider Thom Brennan (born 1957), American musician Tommy Brennan (trade unionist) (1932–2022), Scottish political activist Tommy Brennan, American comedian and cast member on Saturday Night Live Tom Brennan (barge), a 1949 barge used in outback South Australia during flooding of Coppers Creek
See also Thomas Brannan (1893–1960), English rugby league footballer of the 1910s and 1920s