Thomas Brennan may refer to:
- Thomas Brennan (Irish Land League) (1853–1912), Irish politician
- Thomas Brennan (Fianna Fáil) (died 1953), Irish politician
- Thomas Brennan (Victorian state politician) (1900–1966), Victorian state MP
- Thomas E. Brennan (born 1929), American jurist, former 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 coach) (born 1949), American sportscaster and former University of Vermont basketball coach
- Tom Brennan (basketball) (1930–1990), basketball player for Villanova University and the Philadelphia Warriors
- Tom Brennan (baseball) (born 1952), 1980s baseball player
- Tom Brennan (ice hockey) (1922–2003), American ice hockey player for Boston Bruins
- Thom Brennan (born 1957), musician
Famous quotes containing the word thomas:
“I would not fear the devil in the loin
Nor the outspoken grave.”
—Dylan Thomas (1914–1953)