John Carnac | |
|---|---|
 Miniature of John Carnac (1786) by Ozias Humphry | |
| Born | c. 1721 |
| Died | 29 November 1800 Mangalore, Kingdom of Mysore |
| Allegiance |  Kingdom of Great Britain |
| Service | British Army |
| Rank | Brigadier General |
| Commands | Indian Army |
Brigadier-General John Carnac (c. 1721 – 29 November 1800) was a British officer who served three times as Commander-in-Chief of India.