Maud Kathleen Lewis was a Canadian folk artist from Nova Scotia. She lived most of her life in poverty in a small house in Marshalltown, Nova Scotia. She achieved national recognition in 1964 and 1965 for her cheerful paintings of landscapes, animals and flowers, which offer a nostalgic and optimistic vision of her native province. Several books, plays and films have been produced about her. She remains one of Canada's most celebrated folk artists. Her works are displayed at the Art Gallery of Nova Scotia, as well as her restored house, whose walls she adorned with her art.

Folk art covers all forms of visual art made in the context of folk culture. Definitions vary, but generally the objects have practical utility of some kind, rather than being exclusively decorative. The makers of folk art are typically trained within a popular tradition, rather than in the fine art tradition of the culture. There is often overlap, or contested ground with 'naive art'. "Folk art" is not used in regard to traditional societies where ethnographic art continue to be made.