Mary Lou Goertzen, born in 1929 in Kansas, is an American artist, Mennonite, and peace activist. She is well-known for her pen-and-ink drawings highlighted with splashes of watercolor, most often of flowers and plants. From 1980 through 1990, her drawings graced a series of porcelain china she designed for Block China of New York. She currently resides in Deadwood, Oregon.