Montagu Bertie, 2nd Earl of Lindsey, KG, PC, was an English soldier, courtier, and politician who sat in the House of Commons between 1624 and 1626. He was created Baron Willoughby de Eresby by writ of acceleration in 1640 and inherited the peerage of Earl of Lindsey in 1642. He fought in the Royalist army in the English Civil War.

Baron Willoughby de Eresby is a title in the Peerage of England. It was created in 1313 for Robert de Willoughby. Since 1983, the title has been held by Jane Heathcote-Drummond-Willoughby, 28th Baroness Willoughby de Eresby.