Susan Barrantes (June 9, 1937 - September 19, 1998) was the mother of Sarah, Duchess of York. She was born Susan Mary Wright in England, the daughter of Lieutenant FitzHerbert Wright and his wife Doreen (née Wingfield).

From childhood, Susan's interests revolved around horses and she was a keen show jumper and avid polo player that provided a connection to the British royal family. On January 17, 1956, she married Major Ronald Ivor Ferguson (1931 - 2003), who would later become the Queen's polo manager. The couple had two daughters: Jane Louisa, born on August 26, 1957, and Sarah Margaret, later the Duchess of York, born on October 15, 1959.

Divorced, she married a second time in 1975 to professional polo player and widower, Hector Barrantes of Argentina. She moved to Argentina where she and her husband maintained a large ranch at El Pucara , breeding polo ponies and cattle. In 1990 her second husband died of cancer.

Shortly before the automobile accident that took her life, Mrs. Barrantes authored a book titled "POLO" with the foreword written by the Prince of Wales.

She is buried in La Recoleta Cemetery in Buenos Aires, the capital of Argentina.