Every year, thousands of Indian students register for online olympiad exams without a clear picture of all the options available to them. Some families stick with the first platform they hear about. Others register their child for too many exams at once, leaving no time to prepare for any of them properly. A clear, comprehensive list makes both of these problems easier to avoid.
This guide compiles the most credible and widely participated online olympiad examinations available to Indian school students in 2026 — across all major subjects and class groups. For each exam, you will find key information about the conducting body, subjects covered, class eligibility, format, and how to register.
Subject-Wise Online Olympiad Directory for 2026
Mathematics
International Mathematics Olympiad (IMO) — Science Olympiad Foundation. Available for Class 1 to 12. The IMO is conducted in schools with online delivery increasingly available. Registration opens in July–August through your school. SOF's online practice portal provides extensive home-based practice material year-round.
iOM — International Olympiad of Mathematics by Silverzone Foundation. Available for Class 1 to 12. Online participation is available through school affiliation. Silverzone's three-level structure allows strong performers to progress to national and international rounds.
Science
National Science Olympiad (NSO) — Science Olympiad Foundation. Class 1 to 12. Covers Physics, Chemistry, and Biology. Registration through schools from July to September. Online mock tests and previous year papers are available for home practice.
iOS — International Olympiad of Science by Silverzone Foundation. Class 1 to 12. Follows CBSE, ICSE, and state board syllabi. Individual registration is also available for some students.
English
International English Olympiad (IEO) — Science Olympiad Foundation. Class 1 to 12. Tests grammar, reading comprehension, vocabulary, and writing skills.
iOEL — International Olympiad of English Language by Silverzone. Class 1 to 12. Known for reading comprehension and creative writing assessment.
Computer Science and Cyber Awareness
National Cyber Olympiad (NCO) — Science Olympiad Foundation. Class 3 to 12. Covers computer fundamentals, logical reasoning, and cyber awareness.
iOI — International Olympiad of Informatics by Silverzone. Class 1 to 12. Tests programming concepts, logical reasoning, and digital literacy.
General Knowledge
International General Knowledge Olympiad (IGKO) — Science Olympiad Foundation. Class 1 to 8. Covers current events, history, geography, and science facts.
iGKO — International General Knowledge Olympiad by Silverzone. Class 1 to 10. Particularly useful for younger students building awareness beyond textbooks.
Multi-Subject and Diagnostic
NSTSE — National Level Science Talent Search Examination by Unified Council. Class 2 to 12. Known for subject-wise diagnostic reporting.
ITO Monthly Online Tests — Indian Talent Olympiad. Class 1 to 10. Subjects include Mathematics, Science, English, GK, Computers, Drawing, Essay, and Social Studies.
2026 Registration Calendar — Key Windows to Note
- June to July — Registration windows open for most school-year olympiads
- July to September — Individual student registration and school submissions are accepted
- October to December — Level 1 examinations take place for most major olympiads
- January to February — Level 2 examinations for qualifiers
- February to April — Results, rank cards, certificates, and medals are dispatched
Step-by-Step Registration for Individual Students
- Go to the official website of the olympiad organisation
- Look for an individual or student registration link
- Select your class, subject, and exam year
- Fill in student, parent, and school details
- Pay the registration fee
- Save the confirmation email and registration ID
- Log in before exam day to familiarise yourself with the test interface
Key Documents You May Need
- Student's full name as per school records
- Current class, section, and school name
- Parent email address and mobile number
- Payment method
- Passport-size photograph for some registrations
Choosing the Right Exam from This List
With so many options available, the risk of over-registering is real. The most effective approach is to choose one or at most two exams per academic year, prepare for them consistently, and use the result to inform the following year's choices.
One well-prepared olympiad attempt produces more learning, more confidence, and more genuine academic growth than five unprepared ones.
Final Note
The online olympiad landscape in India in 2026 is richer, more accessible, and more diverse than it has ever been. Use this guide as your starting point, visit the official websites for the latest registration information, and begin with one focused, committed choice.
