Jan Elnor Leach (born 1953) is an American plant pathologist.
[2] She joined the faculty of Colorado State University in 2004 and she is a professor in the Department of Agricultural Biology in the Colorado State University College of Agricultural Sciences.
She was made a University Distinguished Professor in 2007, and the Research Associate Dean of the College of Agricultural Sciences in 2015.
[5] She has served as the editor of the journal Molecular Plant-Microbe Interactions; she has been the co-editor of the Annual Review of Phytopathology with Steven E. Lindow from 2015 to 2022.
[6] In 2019, she won the Agropolis Fondation Louis Malassis International Scientific Prize for Agriculture and Food in the "Distinguished Scientist" category.