Spencer Austen-Leigh (17 February 1834 – 9 December 1913) was an English cricketer.
He was born at Speen, Berkshire, and was educated at Harrow School.
In 1862, Austen-Leigh made his debut for Sussex against Kent at the Royal Brunswick Ground.
He made nine further first-class appearances for Sussex, the last of which came against the Marylebone Cricket Club in 1866.
His brothers, Arthur, Cholmeley and Charles, all played first-class cricket.