International Olympiad in Informatics (IOI)

Coding

IOI Foundation and the annual host country

IOI 2027 (host to be confirmed)approximate

August 8, 2027 (UTC)

The premier annual competitive programming olympiad for secondary school students. Contestants solve algorithmic tasks scored by an online judge over two five-hour on-site days, with national teams of up to four selected by their own country's informatics olympiad.

Registration

Format: In person
Age: 13-19
Participation: Individual
Location: International
Entry fee: Free
Prize: Gold, silver or bronze medal awarded by score.

Timeline

IOI 2026 begins (Uzbekistan)August 9, 2026 (UTC+5) source
IOI 2026 endsAugust 16, 2026 (UTC+5) source
IOI 2027 (host to be confirmed)approximateAugust 8, 2027 (UTC) source

Country pathways

Real national qualifier pathways into this competition, where one exists.

India official site

Zonal Informatics Olympiad (ZIO)approximateNovember 8, 2026 source
Zonal Computing Olympiad (ZCO)approximateJanuary 10, 2027 source
Indian National Olympiad in Informatics (INOI)approximateFebruary 14, 2027 source

Visit the official site