Science fairs occupy a unique place in the STEM landscape. At their highest level, they function less like school competitions or 'science experiment fairs' and more like academic conferences in that students submit original research, defend their methodology before expert judges, and compete for scholarships that can reach six figures. Performing well at a recognized sceince fair for high school students specifically is one of the strongest credentials available to those applying to selective universities.
The competitions below represent the most respected science fairs and research programs in the country today.
1. Regeneron International Science and Engineering Fair (ISEF)
Location: Phoenix, AZ (2026); rotates annually
Cost: Free to compete (qualifying fair fees vary)
Dates: May 2026; affiliated qualifying fairs run fall through mid-April
Eligibility: Grades 9–12; must win at a Society for Science affiliated regional or state fair
Accepts International Students: Yes
ISEF is the largest and most prestigious pre-college STEM research competition in the world. Roughly 1,800 finalists from 75+ countries compete across 22 categories: biochemistry, robotics, behavioral sciences, materials science, and more, compete for nearly $9 million in scholarships and prizes, including a top award of $100,000. However, applicants do not apply to ISEF directly; they earn their spot by placing at a Society-affiliated science fair. That means the path to ISEF starts at the local or regional level, often a year before the international stage.
2. Regeneron Science Talent Search (STS)
Location: Washington, D.C. (Finals Week)
Cost: Free
Dates: Applications open April 2026; deadline November 5, 2026 at 8 PM ET
Eligibility: High school seniors only; U.S. citizens, permanent residents, or students at U.S.-accredited schools abroad
Accepts International Students: Limited: U.S.-accredited schools only
Often called "the Nobel Prize of high school science," STS is the nation's oldest research competition, dating to 1942. Around 2,600 seniors apply each year; 300 are named Scholars, and 40 advance to D.C. as Finalists, competing for $3.1 million in awards with a top prize of $250,000. Unlike ISEF, STS is judged holistically, meaning that the research report is one piece. However, essays, recommendations, and demonstrated potential as a future STEM leader carry significant weight. Alumni include 13 Nobel laureates and two Fields Medalists.
3. Junior Science and Humanities Symposium (JSHS)
Location: 49 regional symposia nationwide; national event TBD
Cost: Free
Dates: Regional events typically January–March
Eligibility: Grades 9–12; U.S. citizens or permanent residents for scholarship eligibility
Accepts International Students: No (DoD-sponsored)
Note: As of late 2025, the national JSHS program was suspended by its federal funder. Several regional symposia (including Connecticut, Northern New England, and Texas) are still holding 2026 events independently, but the national competition is on pause. Check jshs.org for the latest status before building a strategy around it.
Sponsored by the U.S. Army, Navy, and Air Force, JSHS has historically been the strongest counterpart to ISEF for students whose research leans applied or defense-relevant. The format of a written paper plus oral defense in front of judges closely mirrors academic conferences, making it especially valuable for students who want to practice presenting research the way scientists actually do.
4. Genes in Space
Location: Virtual proposal phase; winning experiment runs on the International Space Station
Cost: Free
Dates: Submissions typically open winter, close in April
Eligibility: Students ages 13–18
Accepts International Students: U.S. and select international (varies by year)
Genes in Space asks one extraordinarily specific question: what DNA experiment would you run in microgravity? Winning proposals are actually launched to the ISS and conducted by astronauts. For students drawn to molecular biology, biotech, or space medicine, no other competition offers a credit quite like "my experiment ran on the ISS." It's also one of the few competitions where a single student with a strong idea can advance without a research lab affiliation.
5. International BioGENEius Challenge
Location: Finals held annually at the BIO International Convention
Cost: Free
Dates: Local and state qualifiers run spring; international finals in summer
Eligibility: Grades 9–12
Accepts International Students: Yes
Run by the Biotechnology Institute, the BioGENEius Challenge is the premier competition specifically for biotechnology research with healthcare, sustainability, environmental, and global health tracks. It's smaller and more focused than ISEF, which can be an advantage: finalists get direct access to leading industry researchers and venture investors at the BIO convention, where biotech executives and academics gather.
6. Conrad Challenge
Location: Virtual rounds + Innovation Summit (Houston / Space Center area)
Cost: Free to apply
Dates: Activation phase opens fall; Innovation Summit in spring
Eligibility: Ages 13–18, teams of 2–5
Accepts International Students: Yes
The Conrad Challenge leans further toward innovation and entrepreneurship than pure research. Teams develop products and ventures addressing problems in aerospace, cyber-tech, energy, health, and smart cities, advancing through written proposals, investor pitches, and a finals event modeled on a tech accelerator. It's an excellent fit for students who want to combine STEM research with business strategy — particularly those eyeing engineering or entrepreneurship paths in college.
7. Stockholm Junior Water Prize
Location: U.S. national finals; international finals in Stockholm during World Water Week
Cost: Free
Dates: State competitions in spring; nationals in summer
Eligibility: Ages 15–20; high school students
Accepts International Students: Yes — country-level competitions worldwide
The most prestigious water-focused research competition in the world, the Stockholm Junior Water Prize is awarded by His Majesty the King of Sweden at a ceremony during World Water Week. Projects focus on water quality, conservation, treatment, and management. For students with environmental science interests, this is an unusually concentrated path: only one student or team per country advances to the international stage, making national-level recognition itself a strong credential.
8. Davidson Fellows Scholarship
Location: Application-based; recognition ceremony in Reno, NV
Cost: Free
Dates: Application deadline February
Eligibility: Under 18 at deadline; U.S. citizens or permanent residents
Accepts International Students: No
Not a science fair in the traditional sense — there's no booth and no judging panel during the work — but the Davidson Fellows Scholarship is one of the highest-prestige recognitions a young researcher can receive. Awards of $10,000, $25,000, and $50,000 go to fewer than 25 students nationally each year for work judged to be at a "genuinely significant" level — meaning publishable, patentable, or comparable to graduate-level output. If your research is strong enough to be considered, applying signals serious ambition.
9. Local and Regional ISEF-Affiliated Fairs
Location: Varies by region
Cost: Usually free; some have small registration fees
Dates: Fall through mid-April
Eligibility: Varies; typically grades 9–12 (some include middle school)
Accepts International Students: Varies by fair
Most students reading this should start here. Regional fairs are the qualifying gateway to ISEF, but they're also valuable in their own right: structured deadlines, judging by working scientists, scholarship opportunities, and a clear path to advance. The Society for Science fair directory lets you find affiliated fairs by location. Don't underestimate these — placing well at a regional fair is meaningful on its own, and it's how every ISEF finalist begins.
How to Choose the Right Competition
The "best" choice for you depends on what you're trying to accomplish, and what science fair project idea feels like the best fit for your trajectory.
If you want the most prestigious general research credential, start with regional fairs and aim for ISEF. If you're a senior with a strong, finished body of independent work, prioritize the Regeneron STS as its November deadline rewards students who've been researching since junior year or earlier. If your work is biotech-focused, the BioGENEius Challenge gets your research in front of the actual industry; if it's water or environment-focused, the Stockholm Junior Water Prize is the right ceiling. Students with entrepreneurial or product-oriented projects will get more out of the Conrad Challenge than a traditional fair, and students with truly graduate-level work should consider the Davidson Fellows.
For most students, the answer is a sequence rather than a standalone activity. A strong project that places at a regional fair often qualifies for ISEF, can be reworked into a Davidson application, and may fit categories at JSHS (if it returns), BioGENEius, or the Stockholm Junior Water Prize depending on the subject. The research is the asset; the competitions are the surfaces where it gets recognized.
What Comes After the Science Fair
A science fair entry is only as strong as the research behind it, and the hardest part isn't the poster, the pitch, or the application. It's finding a real research question, learning the methods to investigate it rigorously, and producing work that holds up to expert scrutiny.
That's where Echelon Scholars comes in. Founded by researchers from Harvard, Stanford, and UC Berkeley, our graduate-level research mentorship program pairs ambitious high schoolers one-on-one with mentors who guide them through original research. Our program covers the entire process from question to methodology to publication-quality output. Many of our students go on to compete in the fairs above; more importantly, they leave with research they're genuinely proud of.If you're aiming for ISEF, STS, or any of the competitions on this list, the work starts now. The deadlines are closer than they look.
+1 (408) 337-9214
admissions@echelonscholars.com