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
• James Sinclair, British entrepreneur (born 1985), founder of The Partyman Group (incorporating the Rossi Ice Cream Company)