Diana E. Northup is an American microbiologist, speleologist, ecologist, Visiting Professor of Biology, and Professor Emerita of Library Sciences with the University of New Mexico. Her research focuses on the microbial ecology of caves around the world. Dr. Northup is a Fellow of the National Speleological Society and the Cave Research Foundation. She wrote the Wiley textbook Microbial Ecology. She was awarded the National Speleological Society Science Prize in 2013.