Leonard Hugh Long OAM (25 April 1911 – 3 November 2013) was an Australian painter of the Australian School of landscape painters.
Born in Summer Hill, New South Wales, the son of a baker, Long was a landscape artist in oils. He was raised in Mittagong on the Southern Tablelands of New South Wales and showed an early aptitude for drawing. He painted his first painting at the age of 16. He started his working life as a watch-maker in nearby Bowral later moving to Nowra for work.