Peggy Goodenow Lemaux is an American plant biologist. She won a 2003 Dennis R. Hoagland Award. She graduated from Miami University, and University of Michigan, She studied with Stan Cohen. She was a research scientist at DeKalb Genetics. She was as a cooperative extension specialist at the University of California, Berkeley. She won a grant from the Gates Foundation to study sorghum. She developed genetically modified varieties of barley, and wheat. She opposed an anti-GMO ballot initiative in California. She has several patents.