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 (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