John Abbotts (or Abbott) Smart (12 April 1891 – 3 October 1979) was an English first-class cricketer and Test match umpire. Smart was born in Forest Hill near Marlborough in Wiltshire, into a cricketing family. His father was a professional cricketer for Wiltshire; and his brother Cyril Smart played first-class cricket for Warwickshire and Glamorgan, who set a world record in 1935 by hitting 32 runs off one over. Two other brothers played as professionals at clubs in Wales. He finally retired in 1948. He died in Bulkington, near Nuneaton, in Warwickshire.