Montagu Bertie, 2nd Earl of Lindsey, KG, PC (1608 – 25 July 1666) 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.