Bonnie Lynn Bassler (born 1962) is an American molecular biologist who has researched chemical communication between bacteria known as quorum sensing, and contributed to the idea that disruption of chemical signaling can be used as an antimicrobial therapy. She is the Squibb Professor in Molecular Biology and chair of the Department of Molecular Biology at Princeton University. She is a Howard Hughes Medical Institute Investigator and her research focuses on bacterial quorum sensing, which is the cell-to-cell communication in bacteria.