LeConte Stewart was born in 1891 in Glenwood, Utah. His extensive art education began with study in 1912 at the University of Utah with Edwin Evans and private instruction with A.B. Wright. From 1913 through 1914 he attended the Art Students League summer school at Woodstock, New Yorkwhere he studied with John F. Carlson and Walter Goltz. He later attended the Pennsylvania Academy of Fine Arts in Chester Springs.
During his art study, Stewart pursued a teaching career, starting in 1911 when he became an elementary teacher in the Murray City Schools. He then taught in several Utah school districts including Davis County, Salt Lake, and Ogden. He left Ogden Senior High School to become chairman of the Art Department at the University of Utah in Salt Lake City, where he retired in 1956 as professor emeritus.
LeConte Stewart mainly painted oil landscapes, which he usually painted quickly, on-site. He is predominantly known for his unidealized paintings of rural Utah; but he was also very productive in portraiture, mural painting, drawing, etching, lithography, pastel, and design.