| Neil L. Kelleher | |
| Birth Date: | 28 April 1970 |
| Nationality: | American |
| Field: | Chemist Biochemist |
| Work Institutions: | University of Illinois at Urbana–Champaign Northwestern University |
| Alma Mater: | Pacific Lutheran University University of Konstanz Cornell University Harvard University |
| Doctoral Advisor: | Fred McLafferty Tadhg Begley |
| Known For: | Mass spectrometry Top-down proteomics Electron-capture dissociation |
Neil L. Kelleher is the Walter and Mary Elizabeth Glass Professor of Chemistry, Molecular Biosciences, and Medicine at Northwestern University. His research focuses on mass spectrometry, primarily its application to proteomics. He is known mainly for top-down proteomics and the development of the fragmentation technique of electron-capture dissociation with Roman Zubarev while in Fred McLafferty's lab at Cornell University.