Thomas Sinclair

Thomas Sinclair may refer to:


 * Thomas Sinclair (politician, 1857–1940), Northern Irish Member of Parliament
 * Thomas Sinclair (politician, 1838–1914), Ulster-Scots businessman and politician
 * Thomas Sinclair Jr. (1841–1888), politician in Manitoba, Canada
 * Tom Sinclair (born 1958), American athlete
 * Tom Sinclair (footballer) (1880–1968), Scottish football goalkeeper
 * Tommy Sinclair (footballer, born 1921) (born 1921), English footballer
 * Tommy Sinclair (footballer, born 1897) (1897–1967), English footballer
 * Tommy Sinclair (Scottish footballer), Scottish footballer
 * Thomas Sinclair (writer), a contributor to the British Dictionary of National Biography
 * Thomas Sinclair (died 1881), American businessman whose widow built the Brucemore mansion in Cedar Rapids, Iowa
 * Thomas Sinclair, Australian actor in silent films such as The Kelly Gang (1920)
 * Tom Sinclair, coxswain of Scottish lifeboat RNLB Emma Constance
 * Thomas Sinclair, fictional character in the Killzone video games
 * Albert Thomas Sinclair, American lawyer who corresponded with Archduke Joseph Karl of Austria about the Romani language