International Logic Olympiad 2026
Where Global Minds Compete in Logic
A premier international competition fostering logical thinking, analytical reasoning, and problem-solving excellence among students worldwide
What Is the International Logic Olympiad?
The International Logic Olympiad (ILO) is a global academic competition designed to challenge and celebrate students' abilities in logical reasoning, critical thinking, and problem-solving. Established to promote intellectual excellence and analytical skills, ILO brings together talented young minds from around the world to engage with complex logical puzzles, mathematical reasoning, and strategic thinking challenges.
Our mission is to cultivate a generation of clear thinkers who can approach problems systematically, evaluate evidence critically, and construct sound arguments. In an era of information overload and complex global challenges, the ability to think logically is not just an academic skill—it is essential for informed citizenship, professional success, and personal decision-making.
ILO provides a rigorous yet supportive environment where students can test their reasoning abilities against international standards, connect with like-minded peers, and develop skills that transcend traditional subject boundaries. Whether students aspire to careers in law, computer science, engineering, medicine, or any field requiring analytical thinking, the logical reasoning skills honed through ILO serve as a foundation for lifelong learning and achievement.
ILO 2026 at a Glance
Competition Name
International Logic Olympiad 2026
Divisions
Junior Division (Grades 6-8) & Senior Division (Grades 9-12)
Competition Format
Hybrid (Online preliminary rounds, In-person finals)
Registration Period
January 14 – March 18, 2026
Preliminary Rounds
Junior: April 18-19, 2026 (Offline)
Senior: April 25-26, 2026 (Hybrid)
Final Round Location
Stanford University Campus
July 1-3, 2026
(Subject to confirmation)
Competition Timeline
Junior Division
Senior Division
Competition Structure & Rounds
Preliminary Round
The preliminary round serves as the qualifying stage for ILO 2026. Students compete individually in age-appropriate logical reasoning challenges designed to assess analytical thinking, pattern recognition, and problem-solving skills.
- •Junior Division: In-person preliminary test (April 18-19, 2026)
- •Senior Division: Hybrid format with both in-person and online options (April 25-26, 2026)
- •Top performers advance to represent their region or country in the final round
Team Formation
Following the preliminary round, top-performing students are organized into regional or national teams. The selection process ensures fair representation and recognizes excellence across different geographic areas. Qualification and scoring routes vary by age group, ensuring appropriate assessment for different experience levels.
Final Round at Stanford University
The culminating event of ILO 2026 brings together the world's top young logicians for three days of intensive competition, collaboration, and celebration of intellectual achievement. Finalists compete in team and individual events, engage with leading academics, and experience the vibrant intellectual community of one of the world's premier research universities.
Note: The final round location at Stanford University is subject to confirmation. Updates will be communicated to all registered participants.
Competition Structure Overview
Important: Fair Assessment for All Participants
Qualification and scoring routes vary by age group, ensuring a fair assessment that accounts for different levels of experience and skill among participants. There is no minimum cut-off score required—finalists are selected based on top performers compared to the participation pool.
Ready to Challenge Your Logical Thinking?
Join students from around the world in the premier international logic competition. Registration opens January 14, 2026.