Gordon Thomas Calthrop Campbell, Baron Campbell of Croy, PC, (June 8, 1921-) was a British Conservative politician.

After serving in the Second World War, he served the Foreign Office in New York and Vienna until 1957.

Elected to parliament in 1959, he served as Member of Parliament for the constituency of Moray and Nairn until February 1974. He was Secretary of State for Scotland during the whole of Edward Heath's government.