Iranian Combinatorics Olympiad 2026 Registration, Check Details Here

The Iranian Combinatorics Olympiad 2026 Registration is officially open for the 6th edition of the competition. Organized globally by the ICO Scientific Committee, this contest tests mathematical creativity, problem-solving, and combinatorial reasoning across multiple student levels.

Whether you are a middle school student just beginning your competition journey or an advanced high school/university contestant preparing for the International Mathematical Olympiad (IMO), the Iranian Combinatorics Olympiad (ICO) offers dedicated difficulty levels for every age group.

Also Check - Unicus Mathematics Olympiad

Iranian Combinatorics Olympiad 2026 Registration Dates and Latest Updates

Official registration for the 6th Iranian Combinatorics Olympiad (ICO 2026) opened on October 25, 2026, and will officially close on November 9, 2026. All team creation, member verification, and level selections must be submitted online through the official portal before the deadline.

Competition Levels and Eligibility Categories

The Iranian Combinatorics Olympiad 2026 Registration portal features four distinct levels tailored to different academic stages:

• Junior Level: Designed for younger school students focusing on fundamental logic, counting principles, and elementary combinatorics.

• Intermediate Level: Suited for high school students developing intermediate problem-solving techniques and graph theory basics.

• Advanced Level: Built for experienced Olympiad competitors, features a two-round system (First Round on Nov 20, Second Round on Nov 27).

• Open Level: Unrestricted category open to university students, teachers, and independent math enthusiasts, featuring a two-round format.

Also Check - Unicus English Olympiad 2027

Step-by-Step Guide for Iranian Combinatorics Olympiad 2026 Registration

Forming a team and signing up for ICO 2026 requires a few simple steps on the central platform:

1. Create Individual Accounts: Every team member must first create an individual account on ico-official.com and verify their date of birth.

2. Log In to Portal: The designated team leader logs into their verified ICO dashboard.

3. Form a Team: Navigate to the ICO 2026 Competition section and select "Create Team."

4. Add Teammates: Search and invite up to 2 additional verified teammates using their registered account details (team size is 1 to 3 members).

5. Select Level: Choose the appropriate level (Junior, Intermediate, Advanced, or Open) based on age and eligibility.

6. Submit Application: Review all member details and complete your registration before November 9, 2026 (23:59 Tehran Time).

Important Rules and Guidelines for Participants

• Verified Teammates: All members must have active accounts with accurate birth dates prior to joining a team.

• Single Level Restriction: A contestant can only participate in one level during the ICO 2026 season.

• Time Zone Alignment: Exam timings are fixed in Iran Standard Time (Tehran Time - UTC+3:30). Ensure you convert the exam start times to your local time zone.

• Two-Round System: Advanced and Open levels require qualifying in the First Round (Nov 20) to advance to the Second Round (Nov 27).

Iranian Combinatorics Olympiad 2026 Registration Key Takeaways 

Completing your Iranian Combinatorics Olympiad 2026 Registration before November 9, 2026, is essential to secure your team's spot in this prestigious global contest. With flexible team sizes of 1 to 3 members and tailored levels ranging from Junior to Open, ICO 2026 offers an exceptional platform to benchmark your combinatorial skills. Make sure all team members verify their accounts early to avoid technical delays on the closing date.

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