Regeneron Science Talent Search vs Regeneron ISEF 2026
Comparing two elite STEM opportunities. Both are competitions for high school students.
| Regeneron Science Talent Search | Regeneron ISEF 2026 | |
|---|---|---|
| Prestige Tier | Tier 1 — Elite | Tier 1 — Elite |
| Type | Competition | Competition |
| Organization | Society for Science | Regeneron |
| Acceptance Rate | Approximately 0.2-0.3% (2% of ~2,000 applicants become Top 40 finalists; 15% become Top 300 scholars). Highly selective with ~2,000 projects submitted annually. | Roughly 1,700 finalists are selected from 365 affiliated fairs worldwide. Getting to ISEF requires first winning regionally, which itself is competitive. Estimated <1% of all science fair participants globally reach ISEF. At the ISEF itself, approximately 600 of the 1,700 finalists (~35%) receive some award. |
| Applicants | Approximately 2,000 projects submitted per year; historically 147,000 students have competed since 1942 | Millions of students compete in science fairs globally each year; approximately 1,700–1,800 reach ISEF as finalists |
| Deadline | 2026-11-05 | — |
| Cost to Apply | Free | Free |
| US Only | Yes | No / International |
| Grades | High school seniors only | Grades 9–12 (high school students only; middle schoolers compete in the separate Junior Innovators Challenge) |
| College Impact | Regeneron STS is considered one of the most prestigious high school science competitions and carries significant weight in college admissions, particularly for top-tier universities (Ivy League, MIT, ... | ISEF finalist status is one of the most powerful extracurricular credentials in college admissions. Being named an ISEF finalist (simply qualifying) is Tier 1 on most admissions frameworks. Grand Awar... |