Ian Douglas Campbell, 11th and 4th Duke of Argyll (June 18, 1903 ? April 7, 1973) was a Scottish Peer. He was the 11th Duke of Argyll, but is known now as the man married to infamous nymphomaniac Margaret Whigham made famous by his 1963 divorce from her.

Ian Douglas Campbell was the son of Douglas Walter Campbell and his wife Aimee Marie Suzanne Lawrence. He was a great-grandson of George Douglas Campbell, 8th Duke of Argyll.

He was married four times. His first marriage was to the Hon. Janet Gladys Aitken, daughter of Lord Beaverbrook, on December 12, 1927. They had a daughter, Lady Jeanne Louise Campbell, who later married famed author Norman Mailer. Ian and Janet divorced in 1934.

His second marriage was to Louise Hollingsworth Morris Clews on November 23, 1935. This marriage produced an heir, Ian Campbell, 12th Duke of Argyll, and a second son Lord Colin Ivar Campbell. This marriage also ended in divorce in 1951.

The third marriage was to Margaret Whigham, mother of the 10th Duchess of Rutland Frances Helen Sweeny from her previous marriage to Charles Sweeny. They were married on March 22, 1951. Margaret was a glittering society figure with a voracious sexual appetite. Even while married to the Duke, she carried on affairs with infamous men from Douglas Fairbanks Jr. to Duncan Sandys, the minister of defense. The marriage was childless and they divorced in 1963, after the Duke photographed one of her sexual exploits. In the infamous divorce proceeding, the Duke produced Polaroid photographs of the Duchess wearing only her signature triple-string of pearls while fellating an unidentified man. This naturally caused quite a stir in society, and the divorce was granted.

His fourth and final marriage was to Mathilda Costa Mortimer on June 15, 1963. From this marriage he had a daughter, Lady Elspeth Campbell, who died a few days after birth. They remained married until the Duke's death on April 7, 1973.

Ian inherited the dukedom from a distant cousin, Niall Diarmid Campbell, 10th Duke of Argyll, in 1949. He was succeeded by his son Ian.