To become an epidemiologist you typically need at least a master's degree, most often a master of public health (MPH) with an emphasis on epidemiology. You'll usually start with a bachelor's degree in a field such as biology, public policy or social science, complete an internship or practicum during your master's, and some epidemiologists go on to a PhD or a medical degree.
Epidemiologists investigate the patterns and causes of disease and injury. They plan studies, collect and analyze data, and tell health workers, policymakers and the public what they've found, so communities can prevent problems or treat them early.
The facts here come from the US Bureau of Labor Statistics (BLS) Occupational Outlook Handbook profile for epidemiologists, which I read as of October 2026. It's a careers guide, not medical advice.
Epidemiologist pay and jobs at a glance
| Measure | BLS figure |
|---|---|
| Typical entry education | Master's degree |
| Median pay (May 2025) | $87,220 a year |
| Lowest 10% earned less than | $61,270 |
| Highest 10% earned more than | $138,800 |
| Jobs in 2025 | 12,800 |
| Projected growth, 2025 to 2035 | 19%, much faster than average |
| Openings each year | About 800 |
Those are May 2025 figures, as published as of October 2026. Notice the jobs number: it's a small profession, which is why the openings figure is in the hundreds rather than the thousands.
How to become an epidemiologist, step by step
- Pick a relevant bachelor's degree. BLS names biology, public policy and social services, and social science as typical routes into graduate programs.
- Build your math and statistics. Epidemiology programs include public health, the biological and physical sciences, and math and statistics, so a strong numbers background helps you keep up.
- Apply for a master's. A master of public health with an epidemiology emphasis is the common choice, but BLS says other epidemiology-specific programs work too.
- Complete an internship or practicum. Many programs require one, and BLS says it usually lasts from a semester to a year. Federal agencies such as the Centers for Disease Control and Prevention (CDC) and the National Institutes of Health (NIH) offer opportunities.
- Decide whether to go further. Epidemiologists who direct research, including those who teach at universities, often have a PhD or a medical degree.
Applied or research: two different jobs
BLS splits the work into two broad types, and it's worth knowing which one you're aiming for before you choose a program.
- Applied epidemiologists usually work for state and local governments, tackling public health problems through community outreach and surveys.
- Research epidemiologists usually work for universities or with federal agencies such as the CDC or NIH.
- Clinical epidemiologists often hold degrees in both epidemiology and medicine and focus on clinical work.
Government is the biggest employer by a distance. State government accounts for 33% of jobs, with local government next.
BLS adds that epidemiologists in private industry may do research for health insurance companies or pharmaceutical firms. So if public sector pay doesn't suit you, the same training can lead to research roles outside government, and those are often the better-paid ones.
Where epidemiologists earn the most
The best-paid employer isn't the biggest one. BLS reported these medians for May 2025:
| Employer | Median pay (May 2025) |
|---|---|
| Scientific research and development services | $127,410 |
| Hospitals; state, local and private | $104,470 |
| State government | $84,410 |
| Colleges, universities and professional schools; state | $83,700 |
| Local government | $80,680 |
So the public sector employs most epidemiologists, while research companies and hospitals pay more. If you want the higher end, a role in research and development or a hospital is where BLS puts it.
What the work involves
BLS lists duties that mix science, data and communication. You'll typically plan and direct studies of public health problems, collect and analyze data from surveys, interviews and samples, share findings with practitioners and policymakers, manage programs, supervise staff and write grant proposals to fund research.
Most epidemiologists keep a standard schedule, but BLS notes that fieldwork or a public health emergency can mean irregular hours. If lab work interests you more than population studies, see how to become a medical laboratory scientist. And if it's the data side you enjoy, becoming a data scientist uses many of the same statistics skills in a wider range of industries.
Skills that help
BLS lists five qualities for epidemiologists, and they show the job is as much about people as data:
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- Communication. You'll explain health risks to officials, the public and other health workers, in writing and in person.
- Critical thinking. You'll weigh many resources when responding to a public health problem or emergency.
- Attention to detail. You have to move accurately from observations and interviews to conclusions.
- Leadership. You may direct staff during research or a disease investigation.
- Math and statistics. BLS says skill with large databases and statistical software is critical.
If you're still at the bachelor's stage, the last one is the easiest to build early. Take every statistics course you can and learn at least one statistical package.
Anyone widening a job search may like the biomedical engineer career guide.
My verdict
Epidemiology is a smaller field with strong projected growth, and the route is clear: a science or social science bachelor's degree, then a master's with a practicum, ideally at a place like the CDC or NIH. It suits people who like data and want their work to shape public health decisions. Just go in knowing that a master's is the realistic minimum, not a nice extra.
A route into a different profession is mapped out in our guide to the statistician route.
Frequently asked questions
What degree do you need to be an epidemiologist?
BLS says you typically need at least a master's degree, often a master of public health with an epidemiology emphasis. Research leaders often hold a PhD or medical degree.
Can you become an epidemiologist with a bachelor's degree?
It's unusual. BLS lists a master's degree as the typical entry education, with a bachelor's degree as the step into a graduate program.
How much do epidemiologists make?
BLS reported a median of $87,220 a year in May 2025, with research and development services paying a median of $127,410, as of October 2026.
Who employs the most epidemiologists?
State government, with 33% of jobs, followed by local government, hospitals and scientific research and development services.
How long does it take to become an epidemiologist?
It depends on your route. You need a bachelor's degree and then a master's, and BLS says the internship or practicum alone usually lasts from a semester to a year.
