USABO: A Complete Guide

Are you ready to see how far your biology skills can take you? The USA Biology Olympiad (USABO) is the premier national competition for high school students who excel in biology and want to challenge themselves. 

In this guide, you will learn how to qualify for USABO, navigate the registration process, and prepare for each stage of the competition. You will also discover tips from past winners, find out where the 2026 National Finals will be held, and see how you can leverage your achievements to stand out to colleges.

• What Is USABO?
• USABO Awards and Prizes
• How to Qualify for USABO
• How to Get into USABO
• How to Win USABO
• USABO Previous Winners
• Frequently Asked Questions
• Takeaways

What Is USABO?

The USA Biology Olympiad (USABO) is the premier national biology competition for high school students. The event challenges your understanding of biological concepts, data analysis, and laboratory techniques while encouraging you to think critically about how living systems work.

Each year, nearly 12,000 students across the United States participate in this competition organized by the Center for Excellence in Education (CEE). After two rounds of demanding online exams, twenty finalists are chosen to attend the USABO National Finals, a residential training program that emphasizes advanced biology and lab-based problem solving. 

The 2026 National Finals will be held at Harvard University in Cambridge, Massachusetts, from June 21 to July 3, 2026. Participating in the USABO gives you the chance to grow as a scientist, sharpen your research and lab skills, and join a community of dedicated young biologists nationwide.

Students who earn top honors at the National Finals may then represent the United States at the International Biology Olympiad in Vilnius, Lithuania, from July 12 to July 19, 2026.

USABO Awards and Prizes

The USA Biology Olympiad (USABO) celebrates your knowledge, problem-solving skills, and passion for science through certificates and medals. Each stage of the competition recognizes your progress and dedication, rewarding both participation and exceptional achievement. 

Here is how awards are distributed across different stages of the competition:

Receiving a USABO medal places you among the nation’s top young biologists. This recognition strengthens your academic profile and opens doors to advanced training, research opportunities, and international competitions such as the International Biology Olympiad.

How to Qualify for USABO

The USA Biology Olympiad (USABO) allows you to showcase your biology skills on a national level. To qualify, you’ll need to make sure your school is registered, meet the eligibility rules, and complete your own student registration. Here’s everything you need to know before signing up.

Eligibility

To be eligible for the USABO, you must:

• Be in grades 9-12 (Home-schooled students can also participate, provided they make arrangements with a local high school before the registration closing date)
• Not have enrolled in a college or university program
• Be a U.S. citizen or lawful permanent resident with a green card

If you are a senior, you can still compete as long as you have not started full-time undergraduate studies. Schools are encouraged to nominate students who have taken advanced or AP biology courses, but any motivated student with a strong interest in biology is welcome to register.

Required documents

Before your school or test center account can be activated, a few documents must be reviewed to confirm compliance:

Once the registration fee is processed, teachers receive access to the Teacher Resource Center (TRC), and students gain access to the Student Resource Center (SRC). You’ll also receive your unique student ID number, which must be used for all USABO exams during the year.

Contest fees

To participate, your school or authorized test center must pay a $125 registration fee. This fee covers access to official USABO materials and the online exam system. Payment must be completed by the deadline to activate the school’s account and allow students to register.

If you are home-schooled, you may be responsible for the same $125 fee and will need to make arrangements through the USABO to take the exam at a nearby high school or approved test center.

Registration deadline

The registration deadline for schools and institutions is November 8, 2025. Payment must be received by this date for your school’s account to be activated. Once activated, students can register for the 2026 USABO, receive their ID numbers, and gain access to study materials in the Student Resource Center.

All USABO exams are administered online by the Art of Problem Solving (AoPS) on the official exam dates listed in the USABO calendar. Remember to register your USABO ID number with AoPS before the exam window closes.

How to Get into USABO

Earning a spot in the USA Biology Olympiad (USABO) requires focus, consistency, and a clear understanding of the selection process. Each stage helps identify students who are ready to represent the country at the International Biology Olympiad (IBO). Here’s a step-by-step guide to help you understand how to get in:

Step 1: Register for a USABO ID.

Your first step is to register for a USABO ID number through the official USABO website. You will use this ID to access study materials and all exam portals. After registering, your test administrator will verify your details and add you to the school’s roster.

You also need to register your USABO ID with the Art of Problem Solving (AoPS) platform before taking the Open Exam. AoPS manages the online testing process, and without this step, your scores cannot be recorded. Make sure both registrations are complete well before the exam window closes.

Step 2: Take the USABO open exam.

Once registered, you’ll participate in the USABO Open Exam, which is the first qualifying stage. The Open Exam tests your knowledge across multiple areas of biology, such as cell biology, genetics, physiology, ecology, and biochemistry.

The test is administered online through AoPS under the supervision of your test administrator. You’ll sign an online exam certificate to confirm your identity and pledge to follow the competition rules. Students who perform well on the Open Exam move on to the next stage, the Semifinal Exam.

Step 3: Qualify for the semifinal exam.

Only students who are U.S. citizens or legal permanent residents and can provide proof of citizenship (such as a passport or green card) are eligible to advance. The Semifinal Exam features more challenging theoretical and analytical biology questions designed to test your depth of understanding.

Just like the Open Exam, you’ll need to sign and date your online exam certificate and confirm your participation. Your test administrator will verify your identity and confirm that the exam was conducted in accordance with USABO rules. Semifinalists represent the top-performing students nationwide.

Step 4: Advance to the national finals.

The highest-scoring Semifinalists are invited to the USABO National Finals, which will be held at Harvard University in Cambridge, Massachusetts, as part of Harvard’s Pre-College Program. This event, officially known as the USABO Finals Course, brings together the top 20 biology students in the country.

To be eligible, you must meet these criteria:

• Graduate from high school and enter college in 2025, 2026, or 2027.
• Be at least 15 years old as of January 1, 2025, and not turn 19 before July 31, 2025.
• Provide proof of U.S. citizenship or permanent residency.
• Attend the entire National Finals and not participate in any other 2025 summer program.

During the Finals, you’ll complete advanced theoretical and practical biology challenges under expert supervision. This event determines the top twelve students who will earn medals and national recognition.

Step 5: Join the U.S. team for the International Biology Olympiad (IBO).

From the National Finals, the top four gold medalists are selected to represent the United States at the International Biology Olympiad (IBO). These students undergo additional training before competing on the global stage.

If a gold medalist cannot attend the IBO due to unavoidable circumstances, the next highest-ranking finalist (a silver medalist) is selected to join the team. All participants must confirm adherence to USABO and IBO rules to maintain eligibility.

How to Win USABO

Winning the USA Biology Olympiad requires more than just knowing biology facts; it also demands curiosity, creativity, and the discipline to continually improve. Success comes from learning how to think like a biologist, not just memorizing terms or formulas. Here are some practical ways to boost your chances of winning and performing your best at every stage:

1. Understand how the competition works.

The competition consists of several stages: the Open Exam, the Semifinal Exam, and the National Finals. Each stage becomes progressively more challenging, testing your factual knowledge and ability to apply biology concepts to new and complex situations.

The Open Exam focuses on broad concepts, such as cell biology, genetics, and physiology, while the Semifinal Exam delves deeper into molecular mechanisms, data interpretation, and problem-solving. The National Finals include both theoretical and laboratory components, where you’ll perform experiments and analyze results.

Knowing what to expect helps you plan your preparation strategically. For example, if you are strong in theory but struggle with lab skills, spend extra time practicing experimental setups and data analysis. 

2. Focus on deep understanding, not memorization.

You will encounter questions that go far beyond textbook definitions. USABO problems test whether you can connect ideas and think critically about biological systems. Instead of rote memorization, focus on understanding how processes work together—such as how gene regulation affects cell differentiation or how enzyme kinetics influence metabolic pathways.

Study actively by drawing concept maps, teaching topics to others, and explaining mechanisms in your own words. When you truly understand a concept, you can apply it to unfamiliar scenarios, which is what the USABO looks for in top performers.

3. Build strong problem-solving skills.

The ability to analyze data and solve problems quickly gives you a major edge. Practice interpreting graphs, tables, and experimental data from sources like AP Biology questions, college-level textbooks, and research articles.

Work on problems that require logical reasoning and multi-step analysis, such as predicting the outcome of a genetic cross or explaining experimental results in terms of molecular mechanisms. You should also get comfortable making reasonable assumptions and estimating values, especially when data are incomplete.

Set aside time each week to work through past exams or sample problems from the Student Resource Center. The more you practice, the more natural the problem-solving process will feel.

4. Train for both theory and laboratory work.

At the National Finals, your laboratory skills matter as much as your theoretical knowledge. You will perform experiments in areas such as physiology, molecular biology, and ecology, often with limited guidance.

To prepare, spend time in your school or community lab setting up and conducting real experiments. Learn to use micropipettes accurately, measure concentrations, and record observations neatly. Practicing techniques like gel electrophoresis, titration, or microscopy will help you feel confident under timed conditions.

5. Stay consistent and manage your time wisely.

Preparation for the USABO is a long-term effort. You need to balance your schoolwork with focused Olympiad study sessions. Create a schedule that allows you to review topics regularly without burning out.

Many successful participants build good study habits—such as dedicating one to two hours a day to studying and rotating subjects to maintain their interest. Consistency matters more than cramming, and even small daily efforts can lead to significant improvements.

Make sure to take breaks, get enough rest, and maintain a healthy routine. Clear thinking and steady focus are just as important as knowledge when you’re solving complex biology problems.

6. Stay curious and enjoy the process.

Winning the USABO is an amazing achievement, but the journey itself is what helps you grow the most. You’ll deepen your understanding of biology, meet other passionate students, and gain hands-on experience that will serve you well in college and beyond.

Keep your curiosity alive by exploring topics outside the standard curriculum, reading about discoveries in genetics, attending local science fairs, or participating in research projects. Every experience strengthens your connection to the subject and prepares you to think like a true biologist.

USABO Previous Winners

Every year, the USA Biology Olympiad (USABO) brings together some of the brightest and most motivated high school students in the country. The 2025 National Finalists demonstrated not only academic excellence but also passion, creativity, and curiosity that extended beyond the classroom. 

Below are ten standout finalists who truly represent what it means to be a young biologist on the rise:

Among these talented students, Varshith Kotagiri stands out as an inspiring example. His work on developing a fluorescent sensor for biomedical applications demonstrates how curiosity and creativity can lead to a meaningful scientific impact. His journey proves that you do not have to wait for college or a lab internship to contribute to real-world science; you can start innovating right now.

If you are aiming for USABO success, let stories like his remind you that passion for discovery and consistent effort are what truly set you apart.

Frequently Asked Questions

1. How do I qualify for USABO?

To qualify for the USA Biology Olympiad, you must first register for a USABO ID through your school. Once you have your ID, you’ll take the Open Exam, and if you perform well, you’ll move on to the Semifinal Exam, where the top students nationwide are selected for the National Finals. 

You should also ensure that your school’s registration is complete and that fees are paid before the deadline, so you can access study resources and take the exams on time.

2. Where will the 2026 USABO be held?

The 2026 USA Biology Olympiad National Finals will be hosted at Harvard University in Cambridge, Massachusetts, where students will gather for advanced theoretical and practical training. You’ll participate in hands-on experiments, in-depth lectures, and lab sessions led by university professors and experts in various biology fields. 

This experience prepares you for the USABO Finals and potential selection to represent the United States at the International Biology Olympiad in Vilnius, Lithuania.

3. Who won the 2025 USABO?

One of the standout winners of the 2025 USA Biology Olympiad was Varshith Kotagiri from Gatton Academy of Mathematics and Science, who earned a gold medal for his groundbreaking research on a fluorescent sensor for biomedical use. Other top finalists from schools such as Lynbrook High School and Troy High School also demonstrated exceptional talent in both theoretical and laboratory work. 

Takeaways

• You can qualify for the USABO by registering through your school before November 8, 2025, paying the $125 fee, and earning strong scores on the Open and Semifinal Exams.
• The National Finals will take place at Harvard University, where the top 20 students compete through advanced theory and laboratory challenges to determine who will join the U.S. team for the International Biology Olympiad.
• The 2026 USA Biology Olympiad National Finals will be held at Harvard University in Cambridge, Massachusetts, where you’ll take part in lab experiments, lectures, and training sessions led by top university professors.
• Stories like Varshith Kotagiri’s, who developed a fluorescent sensor while still in high school, prove that curiosity and effort can help you make a real scientific impact even before college.
• A college admissions expert can guide you on how to effectively showcase your USABO experience, research projects, and lab skills, making a strong impression on college admissions officers and boosting your chances of getting noticed.