IOI 2023 - Hungary

The latest Olympiad was hosted by Hungary, from August 28th to September 4th. You can visit the event website, or scroll down to read about the IOI organization.



JOI Open Contest 2023
 JOI Open Contest 2023 is an IOI-like open competition for students atschools for secondary education. The main purpose of this contest isto give...

Call for IOI 2026-2027 hosts
 Greetings to the IOI community, I am writing today regarding IOI 2026. As you may know, our usual practice is to take bids for IOI four years in...

Italian Olympiad in Informatics 2022
 For the seventh time, the Italian national contest (valid for the selection of the Italian IOI team) will be mirrored into an online contest. The...

IOI workshop 2022
 Dear IOI community, we plan to organize an IOI workshop in Strumica, Macedonia, 12-16 of May, 2022.

IOI response to invasion of Ukraine
 My greetings to the IOI community. I am writing today to update you on our ongoing discussions within the International Committee (IC) regarding...


International Olympiad in Informatics 2020
 IOI 2020 was held by Singapore online, in September. Check our news section for the latest info.

Singapore hosted IOI 2021
 You can read more about the previous organizers of the IOI on the Editions page.

IOI 2022 took place in Indonesia
 Several other Olympiads have also been scheduled, including IOI 2023 in Hungary and IOI 2024 in Egypt.

IOI 2023 was held in Hungary
 The Olympiad took place in Szeged between August 28th and September 4th.

IOI 2024 will be hosted by Egypt
 IOI 2024 will take place in Egypt, from September 1-8. Check out the Editions page for more information.  Future event

Need more info?


Not sure where to go? Click here to view some basic information on how to learn programming and prepare to win a medal at the IOI.


A couple of volunteers maintain a separate page with stats about people who participated at the International Olympiad in Informatics.


The IOI publishes a journal every year, with original high-quality scientific papers related to education, contests and algorithms.

History of the IOI

Several International Olympiads in Informatics have been organized so far, hosted by a number of different countries.

  • IOI 1989, Bulgaria

  • IOI 1990, Soviet Union

  • IOI 1991, Greece

  • IOI 1992, Germany

  • IOI 1993, Argentina

  • IOI 1994, Sweden

  • IOI 1995, Netherlands

  • IOI 1996, Hungary

  • IOI 1997, South Africa

  • IOI 1998, Portugal

  • IOI 1999, Türkiye

  • IOI 2000, China

  • IOI 2001, Finland

  • IOI 2002, Korea

  • IOI 2003, USA

  • IOI 2004, Greece

  • IOI 2005, Poland

  • IOI 2006, Mexico

  • IOI 2007, Croatia

  • IOI 2008, Egypt

  • IOI 2009, Bulgaria

  • IOI 2010, Canada

  • IOI 2011, Thailand

  • IOI 2012, Italy

  • IOI 2013, Australia

  • IOI 2014, Taiwan

  • IOI 2015, Kazakhstan

  • IOI 2016, Russia

  • IOI 2017, Iran

  • IOI 2018, Japan

  • IOI 2019, Azerbaijan

  • IOI 2020, Singapore*

  • IOI 2021, Singapore*

  • IOI 2022, Indonesia

  • IOI 2023, Hungary


The International Olympiad in Informatics is organized according to the IOI Regulations, and the decision made by the General Assembly.
On this site, you can find all regulations, minutes, and people involved with the organization.