List of Famous people who died at 91

Wilfred Arthur Charles Carter, professionally known as Wilf Carter in his native Canada and also as Montana Slim in the United States, was a Canadian Country and Western singer, songwriter, guitarist, and yodeller. Widely acknowledged as the father of Canadian country music, Carter was Canada's first country music star, inspiring a generation of young Canadian performers.

James Stemble Duesenberry was an American economist. He made a significant contribution to the Keynesian analysis of income and employment with his 1949 doctoral thesis Income, Saving and the Theory of Consumer Behavior.

Kai Lai Chung was a Chinese American mathematician known for his significant contributions to modern probability theory.

Lester Novros was an American artist, animator and teacher.

Leslie Ransselaer Holdridge was an American botanist and climatologist. He was the father of composer Lee Holdridge.