Albemarle Bertie, 9th Earl of Lindsey

Lieutenant-General Albemarle Bertie, 9th Earl of Lindsey (17 September 1744 – 17 September 1818) was a British nobleman and general.

He was the son of Peregrine Bertie, a barrister and great-great-grandson of Montagu Bertie, 2nd Earl of Lindsey.

In 1762, he was commissioned an ensign in the 1st Foot Guards. He became lieutenant and captain in that regiment in 1769, captain and lieutenant colonel in 1776, and colonel in 1781. He became 3rd Major of the regiment 12 March 1789 and 2nd Major on 8 August 1792. In 1793, he was promoted major-general, and was appointed colonel of the 81st Regiment of Foot on September 19. Promoted lieutenant-general in 1798 and general in 1803, he was the colonel of several other regiments, retiring from active service in 1809 upon inheriting the title of Earl of Lindsey from his third cousin.

In 1801, he was nominated as Member of Parliament for Stamford, where the Bertie family had once held an electoral interest, by the Marquess of Exeter, then pre-eminent in the borough. He held the seat until succeeding to his peerage, but showed little activity in Parliament. Lindsey inherited the Irish title of Viscount Cullen by special remainder in 1810, but never claimed it nor was acknowledged in the title. In 1814, he was appointed Governor of Blackness Castle, and in March 1818, of Charlemont Fort.

In 1794, he married Eliza Maria Clay, daughter of William Clay, but they had no children. In 1809, he married Charlotte Susannah Elizabeth Layard, the daughter of a clergyman, and they had three children. The eldest, a daughter, is better known as Lady Charlotte Guest. There were also two sons, who succeeded in turn to their father's titles:
 * George Augustus Frederick Albemarle Bertie, 10th Earl of Lindsey
 * Montagu Peregrine Bertie, 11th Earl of Lindsey