Career
He was appointed Lieutenant Governor of Saint Vincent and the Grenadines in 1845, in which office he served until his death at Kingstown on 18 January 1853. As Lieutenant Governor he was the highest British authority on the island, the direct representative of the Queen. Although Sir John claimed the Baronetcy of Campbell of Ardnamurchan and Airds, his father was the first to claim it as successor to Sir Donald Campbell, the 1st Baronet.
The intervening heirs (the 2nd, 3rd, 4th, and 5th Baronets) did not assume the title.
Eventually the baronetcy was re-created in 1913, but again fell dormant after the death of Sir John"s grandson in 1943.