Frank Lewis Nason (May 12, 1856 – September 12, 1928) was an American mining engineer, teacher, and writer. He was born to Lewis Clark Nason and Maria Julia (Stickles) in New London, Wisconsin and attended Middlebury High School in Middlebury, Vermont. In 1877 he entered Amherst College in Massachusetts, graduating in June, 1882 with an A.B. degree. After two months at Yale Divinity School, he became an instructor, teaching mathematics at Rensselaer Polytechnic Institute in Troy, New York and geology at the nearby Troy Female Seminary. He spent part of 1885–6 at Johns Hopkins University, then received an A.M. from Amherst College in 1885, and on July 29 was married to Tholia Abigail Painter. The couple had two children: Stanley Lewis and Alexia Painter.