George Leslie Hunter was a Scottish painter, regarded as one of the four artists of the Scottish Colourists group of painters. Christened simply George Hunter, he adopted the name Leslie in San Francisco, and Leslie Hunter became his professional name. Showing an aptitude for drawing at an early age, he was largely self-taught, receiving only elementary painting lessons from a family acquaintance. He spent fourteen years from the age of fifteen in the US, mainly in California. Hunter made an extended trip to Scotland, Paris and New York from 1903 to 1905. In 1906 he left San Francisco and returned to Scotland, painting and drawing there, notably in Fife and at Loch Lomond. Subsequently he travelled widely in Europe, especially in the South of France, but also in the Netherlands, the Pas de Calais and Italy. He also returned to New York in 1924 and 1928–1929.

The Scottish Colourists were a group of four painters, three from Edinburgh, whose Post-Impressionist work, though not universally recognised initially, came to have a formative influence on contemporary Scottish art and culture. The four artists, Francis Cadell, John Duncan Fergusson, Leslie Hunter and Samuel Peploe, were prolific painters spanning the turn of the twentieth century until the beginnings of World War II. While now banded as one group with a collective achievement and a common sense of British identity, it is a misnomer to believe their artwork or their painterly careers were heterogeneous.