Jane Heathcote-Drummond-Willoughby, 28th Baroness Willoughby de Eresby

Nancy Jane Marie Heathcote-Drummond-Willoughby, 28th Baroness Willoughby de Eresby (born 1 December 1934) is an English peer.

She is the daughter of James Heathcote-Drummond-Willoughby, 3rd Earl of Ancaster, and Nancy Phyllis Louise Astor (daughter of Waldorf Astor, 2nd Viscount Astor). Her brother Timothy Gilbert (born 19 March 1936) heir apparent of the Earldom of Ancaster, was lost at sea in 1963.

She was one of the six Maids of Honour at the 1953 coronation of Queen Elizabeth II.

She succeeded as 28th Baroness Willoughby de Eresby upon the death of her father in 1983, at which time the Earldom of Ancaster became extinct. She inherited 75,000 acres (300 km²) in Lincolnshire, England and Perthshire in Scotland and is listed at the 1572nd position on the Sunday Times Rich List 2008 with a wealth of £48 million in finance. She is a joint hereditary Lord Great Chamberlain and sat in the House of Lords as a crossbencher.

In 1987 she became a patron of King Edward VI School in Spilsby (now King Edward VI Academy).

She is unmarried and without issue. The co-heirs presumptive are Sebastian St Maur Miller (b. 1965), her older aunt's grandson, and Sir John Aird, 4th Baronet (b. 1940), her younger aunt's son.