Leonard Cullen (23 November 1914 – 15 September 1984) was a South African cricketer.
Cullen was a right-handed batsman who bowled right-arm medium pace.
He was born at Johannesburg, Transvaal Province.
Cullen played all his first-class cricket in England for Northamptonshire, making his debut for the county against Middlesex in the 1934 County Championship.
He made seventeen further first-class appearances, the last of which came against Nottinghamshire in the 1935 County Championship.
In his eighteen first-class appearances, he scored 253 runs at an average of 8.43, with a high score of 40.
With the ball, he took 11 wickets at a bowling average of 59.09, with best figures of 3/73.He died in South Africa on 15 September 1984.