John Birkbeck Lubbock, 2nd Baron Avebury (4 October 1858 – 26 March 1929), was a British aristocrat and banker.

He was the eldest son of John Lubbock, 1st Baron Avebury (1834–1913), and his first wife Ellen Frances Hordern (1841–1879).

At school he played both association football and cricket although not in their representative XIs, but he won in 1876 a game of Eton Fives with Ivo Bligh who was later famous as the captain of the England cricket team of "Ashes" fame.

He also played against Cambridge University as a football 'Blue' in 1881, and was also a 'Blue' at real tennis when he lost in the doubles.

[1] Lord Avebury died unmarried in 1929 at the age of seventy and was succeeded in the Barony by his nephew, John Lubbock.