Mary Keithan earned her B.F.A. from Pennsylvania State University, and her M.F.A. from New York City's Hunter College. Her work has appeared in many exhibitions, including "The Women's Hall of Fame" at Lansing's Belen Gallery, the Michigan State University Museum, and the Pierce Street Gallery in Birmingham, Michigan.
Her photographs, taken with an 8 x 10 field camera, were recently published in the book, Michigan's Heritage Barns. She remains active in the community of art. She lives with her husband in Ray, Michigan.