Thomas Barnett may refer to:
- Thomas Barnett (musician) (born 1973), American singer and songwriter
- Thomas P. Barnett (1870–1929), American architect and painter
- Thomas P. M. Barnett (born 1962), American military geostrategist
- Thomas Speakman Barnett (1909–2003), Canadian politician
- Thomas Barnett (Niagara Falls) (1799–1890), museum proprietor, collector and innkeeper
- Thomas Barnett (footballer) (1876–?), English footballer
- Tom Barnett (American football) (born 1937), former professional American football player
- Tom Barnett (footballer) (1936–2022), English footballer
- Tommy Barnett (footballer) (1908–1986), English footballer
- Tommy Barnett (pastor), American author and pastor
This disambiguation page lists articles about people with the same name.
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