Algernon Percy, 1st Earl of Beverley FSA (21 January 1750 – 21 October 1830), styled Lord Algernon Percy between 1766 and 1786 and known as The Lord Lovaine between 1786 and 1790, was a British politician who sat in the House of Commons from 1774 to 1786 when he succeeded to the Peerage.
Born Algernon Smithson, he was the second son of Hugh Percy, 1st Duke of Northumberland, and his wife, Lady Elizabeth Seymour, only daughter of Algernon Seymour, 7th Duke of Somerset. He was the brother of Hugh Percy, 2nd Duke of Northumberland, and the half-brother of James Smithson. He was educated at Eton.
In 1774, Percy was elected MP for Northumberland. He was elected MP for both Northumberland and Bere Alston in 1780, and chose to continue sitting for Northumberland. In 1786, he left the Commons when he inherited his father's barony of Lovaine (a title which was created for his father with a special remainder to pass to Algernon as a second son). He was created Earl of Beverley, in the County of York, in 1790.
Lord Beverley married Isabella Burrell, second daughter of Peter Burrell and sister of Peter Burrell, 1st Baron Gwydyr, in 1775. Their children were: