Charles Sinclair
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, Scottish soldier, courtier and representative peer
- Charles Sinclair (businessman), British businessman
- Charles Colin Sinclair (boxer), Australian Olympic boxer
- Charles T. Sinclair, an American serial killer also known as the "Coin Shop Killer"
- Charles E. Sinclair, Virginia judge
- Charles Sinclair, Jr., Jamaican politician