# International Earth Science Olympiad (IESO)

Qualify via national earth science Olympiad selection; annual international finals.

## Key facts

| Field | Value |
| --- | --- |
| Organization | International Earth Science Olympiad |
| Category | stem |
| Cost | Free |
| Deadline | 2027-02-28 |
| Eligibility | Grades 9–12 |
| Format | Hybrid (in person + online) |
| Location | Check official site |
| Apply | https://www.ieso-info.org/ |

## About this program

The **International Earth Science Olympiad (IESO)** is a global competition that brings together high school students to test and expand their knowledge of Earth and environmental sciences. Students first qualify through their **national Earth Science Olympiad** or selection process, and top performers are invited to represent their country at the international finals. The competition covers topics such as geology, meteorology, oceanography, astronomy, and environmental science, combining theoretical exams with practical and sometimes field-based activities.

IESO is best suited for students who are strongly interested in Earth science, enjoy problem-solving, and are motivated to study beyond their school curriculum. Participants gain experience in **scientific inquiry**, data interpretation, and collaborative problem-solving with peers from around the world. For students planning to apply to college, selection for a national team or participation in the international round can demonstrate:

- **Advanced subject mastery** in Earth and environmental sciences  
- **Commitment to STEM**, particularly in fields related to Earth systems and sustainability  
- **International collaboration skills** through team and group activities  

Students interested in geoscience, climate science, environmental engineering, or related STEM fields may find IESO especially valuable as early exposure to topics and methods used in earth and planetary sciences. More information, including national selection procedures, is available on the official website.

## Frequently asked questions

### How much does International Earth Science Olympiad (IESO) cost?

International Earth Science Olympiad (IESO) is completely free — there is no participation fee. Costs like travel or optional materials may still apply; check the official site for details.

### What is the application deadline for International Earth Science Olympiad (IESO)?

The application deadline is February 28, 2027. Always confirm on the program's official site, as dates can shift between cycles.

### Who is eligible for International Earth Science Olympiad (IESO)?

International Earth Science Olympiad (IESO) is open to high school students in grades 9–12. Some programs have additional requirements (GPA, coursework, essays, or recommendations) — the full criteria are on the official site.

### Is International Earth Science Olympiad (IESO) online or in person?

International Earth Science Olympiad (IESO) is a hybrid program with both online and in-person components.

### How do I apply to International Earth Science Olympiad (IESO)?

Apply directly through International Earth Science Olympiad's official website. ExtracurricularHub links to the official application — we list and verify programs but don't process applications.

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Last updated: 2026-07-04.
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