Brigadier-General John Carnac (c. 1721 – 29 November 1800) was a British officer who served three times as Commander-in-Chief of India.

[2] The family moved to Dublin, where John studied at Trinity College, receiving his Bachelor of Arts degree in 1740.

[1] He became Brigadier-General in 1764[1] and participated with Clive in the negotiations with Shuja-ud-Daula and the Mughal emperor Shah Alam II in 1765.

[1] He purchased an estate near Ringwood in Hampshire and also participated in a largely unsuccessful housing development in Southampton.

[1] He was dismissed from the East India Company for his involvement in the Convention of Wadgaon in 1779[1][4] and died at Mangalore in November 1800.