Charles Sinclair or St Clair is the name of:
- Charles Sinclair (screenwriter) of The Green Slime and Batman television episodes
- Charles Sinclair, character in Aces: Iron Eagle III
- Charles St Clair, 17th Lord Sinclair (1914–2004), Scottish soldier, courtier and representative peer
- Charles Sinclair (businessman) (born 1948), British businessman
- Charles Colin Sinclair (boxer) (born 1890), Australian Olympic boxer
- Charles T. Sinclair, an American serial killer also known as the "Coin Shop Killer"
- Charles E. Sinclair (1828-1887), Virginia judge
- Charles Sinclair, Jr., Jamaican politician
This disambiguation page lists articles about people with the same name.
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