Nathaniel Everett Green (August 21, 1823 – November 10, 1899) was an English painter, art teacher and astronomer. He professionally painted landscapes and portraits, and also gained fame with his drawings of planets.
Born in Bristol, his interest in astronomy dated from 1859 when he built a telescope for himself. He produced "soft-pencil" drawings of Mars in 1877, which were widely known. Shortly after drawing them, he was the first to suggest that canals on Mars were an optical illusion.
He was founding member of the British Astronomical Association (BAA) and its president from 1897–1898.
Green's daughter, Anne Goold Green, married English landscape painter Laurence George Bomford.
A crater on Mars was named in his honor.