Criminologist refers one who is trained in the field of criminology, or one who studies crime, criminals, and criminal behavior.

A criminologist is a social scientist who studies crime, criminal behavior, and the criminal justice system. Criminologists use their understanding of criminal behavior to develop theories, conduct research, and inform policies that aim to prevent or reduce crime. They analyze data, conduct interviews and surveys, and observe criminal activity in order to better understand why crime occurs and how it can be prevented.

Examples of areas of research for criminologists include:

Criminologists work in a variety of settings, including academic institutions, government agencies, law enforcement agencies, and non-profit organizations. They may also work as consultants for law firms, advocacy groups, or other organizations seeking expertise in criminal justice issues.