Australian geomicrobiologist.
Jillian Fiona Banfield (born 18 August 1959) is professor at the University of California, Berkeley with appointments in the Earth Science, Ecosystem Science and Materials Science and Engineering departments. She is the director of microbiology at the Innovative Genomics Institute, is affiliated with Lawrence Berkeley National Laboratory and has a position at the University of Melbourne, Australia. Some of her most noted work includes publications on the structure and functioning of microbial communities and the nature, properties and reactivity (especially crystal growth) of nanomaterials.