James Sinclair

James Sinclair may refer to:


 * James Sinclair (footballer) (born 1987), English footballer
 * Jimmy Sinclair (1876–1913), South African cricketer
 * James Sinclair (politician) (1908–1984), Canadian politician
 * James Sinclair (fur trader) (1811–1856), Canadian fur trapper
 * James H. Sinclair (1871–1943), U.S. Congressman from North Dakota
 * James Sinclair (conductor), American classical music conductor
 * James Sinclair, 12th Earl of Caithness (1766–1823), Scottish noble
 * James Sinclair, 14th Earl of Caithness (1821–1881), Scottish Liberal politician, scientist and inventor
 * James Sinclair (botanist) (1913–1968), Scottish botanist
 * James Sinclair, 8th Lord Sinclair, Scottish nobleman
 * James Sinclair, English co-founder of EnterpriseAlumni