A criminologist is a social scientist who studies why people commit crimes, how patterns of criminal behavior change over time, and what societies can do to prevent them. The work sits outside the justice system rather than inside it: police officers, prosecutors, and corrections staff respond to crime, while criminologists research it. The Bureau of Labor Statistics classifies these professionals under the sociologist occupation, with a mean annual wage of $111,670 as of May 2024.1U.S. Bureau of Labor Statistics. Sociologists
How a Criminologist Differs From a Criminal Justice Professional
The two fields get confused constantly, and the distinction matters if you’re weighing a career. Criminology is a branch of social and behavioral science focused on the causes, patterns, and effects of crime. Criminal justice is the study of the institutions that respond to it: police departments, courts, and corrections. One asks why crime happens. The other asks how to process it once it does.
In practice, a criminologist might spend years researching whether poverty rates predict property crime in a region. A criminal justice professional might take those findings and redesign patrol strategies or sentencing guidelines. Criminologists develop theories and test them against data; criminal justice practitioners put the resulting insights to operational use. The fields overlap in graduate programs and in some workplaces, but the research-versus-operations split is real and shapes what you’ll do with your days.
What the Day-to-Day Work Looks Like
Most of the job is data analysis. Criminologists pull from large-scale reporting systems like the FBI’s Uniform Crime Reporting program and the National Incident-Based Reporting System to track how crime shifts across time, geography, and demographics.2Federal Bureau of Investigation. Crime/Law Enforcement Stats They look for correlations between economic downturns and spikes in fraud or property offenses. They evaluate whether a specific sentencing policy actually reduced repeat offending. The National Institute of Justice published research finding that three-strikes laws, despite being adopted in more than 20 states, showed virtually no measurable impact on crime rates outside California.3National Institute of Justice. Three Strikes and You’re Out: The Implementation and Impact of Strike Laws That is the kind of finding criminologists exist to produce: testing whether a popular policy holds up under scrutiny.
Victimology is another major research area. Criminologists study the vulnerabilities that lead certain people to be targeted more often, the financial and psychological toll of being victimized, and whether existing legal protections match what victims actually need. Federal law establishes specific rights for crime victims, including the right to restitution, protection from the accused, and timely notice of court proceedings.4Office of the Law Revision Counsel. 18 U.S. Code 3771 – Crime Victims Rights Criminologists assess whether those rights translate into real outcomes or remain largely symbolic.
Penology rounds out the research picture. This means examining whether prisons rehabilitate or warehouse people, and whether diversion programs deliver better results per dollar. The federal cost of incarcerating one person reached $42,672 per year as of fiscal year 2022.5Federal Bureau of Prisons. Federal Prison System Per Capita Costs FY 2022 When criminologists demonstrate that a community-based program costs a fraction of that and produces lower recidivism, legislators pay attention.
Predictive Modeling and Policy Work
A growing slice of the job uses historical data to forecast where crime is likely to concentrate, helping agencies allocate resources with some evidence behind the decision. The work extends into direct policy influence. The First Step Act of 2018 required the Attorney General to develop a risk and needs assessment system that classifies federal prisoners by recidivism risk and routes them into evidence-based programming.6Office of the Law Revision Counsel. 18 USC 3632 – Development of Risk and Needs Assessment System Criminologists are the people who build and validate those assessment tools, and their evaluations of how the Act is being implemented feed back into whether programs get expanded or defunded.7U.S. Department of Justice Office of the Inspector General. Evaluation of the Federal Bureau of Prisons Implementation and Operation of First Step Act Programming
Where Criminologists Work
Government Agencies
Federal agencies like the Department of Justice and the FBI employ criminologists to monitor national crime trends, evaluate policy outcomes, and support law enforcement operations. State-level agencies also hire crime analysts and research specialists, with pay varying by location and seniority.
Universities and Research Institutions
Academic roles center on teaching, publishing original research, and mentoring graduate students. University-based criminologists have more freedom to pick their research topics than government counterparts, who tend to work within the boundaries of current political priorities. Funding comes from university budgets or from competitive external grants, including from the National Institute of Justice.8National Institute of Justice. Funding and Awards The median annual wage for sociologists in educational services was $87,630 as of May 2024, while those in scientific research and development earned $103,910.1U.S. Bureau of Labor Statistics. Sociologists
Private Sector and Think Tanks
Non-profit policy institutes, consulting firms, and organizations like the RAND Corporation and the Brookings Institution hire criminologists for independent research and policy analysis. The work can include expert testimony, evaluations of corporate compliance programs, and collaboration with legislators drafting model statutes. These roles reward people who can translate dense statistical findings for non-technical audiences. Pay ceilings tend to run higher than in government or academia, but the work is often grant-dependent and contract-based, so stability varies.
What You Earn and How Many Jobs Exist
Pay varies substantially by industry. Criminologists working in grantmaking and social advocacy organizations earned a median of $135,210, while those in state government earned $102,760.1U.S. Bureau of Labor Statistics. Sociologists Federal positions on the General Schedule pay scale, which covers roughly 1.5 million civilian federal workers in professional and technical roles, carry locality adjustments and benefits that those raw figures don’t capture.9U.S. Office of Personnel Management. General Schedule
The field is small. The BLS counted about 3,400 sociologist jobs in 2024 and projects 4% growth through 2034, roughly matching the average across all occupations. Around 300 openings per year are expected, mostly from retirements and career changers rather than newly created positions.1U.S. Bureau of Labor Statistics. Sociologists It’s competitive, and advanced degrees and specialized research skills meaningfully separate candidates who land positions from those who don’t.
How to Become One
The path starts with an undergraduate degree in sociology, psychology, or criminal justice. That gets you in the door for entry-level research assistant work. Most positions that involve designing studies or leading projects require a master’s degree, and doctoral work is essentially mandatory for tenure-track professorships and senior policy institute roles. No formal accreditation body exists specifically for criminology programs, though the Academy of Criminal Justice Sciences offers a voluntary endorsement for associate’s through master’s programs that meet at least 85% of its published standards.10Academy of Criminal Justice Sciences. ACJS Program Endorsement FAQ
Coursework leans heavily on statistics. You’ll need comfort with multivariate analysis and software like SPSS or Stata, along with legal research methods. Grounding in constitutional principles, particularly Fourth Amendment search and seizure protections and Fifth Amendment self-incrimination protections, gives criminologists the vocabulary to evaluate whether criminal justice practices hold up legally. Programs also typically require legal writing so graduates can navigate case law and statutory interpretation.