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IOI 2021 - Singapore

Due to COVID-19, IOI 2021 was an online competition. You can visit the event website, or scroll down to read about the IOI organization.



COCI 2021/2022
 Over the next six months we will organize seven online contests as a warm-up for the 2022 season of high school programming competitions. Everyone...

IIOT Contests 2021/22
 For the fifth time, the International Informatics Olympiad in Teams is taking place and will be mirrored into online rounds. These contests have a...

Call for projects
 Dear all, IC is opening this year's Call for projects. The deadline for the proposals is 15.12.2021.

Call for tasks
 Dear IOI community, The Call for Tasks for the International Olympiad in Informatics (IOI) 2022 is now open. The Host Scientific Committee of IOI...

JOI Open Contest 2021
 Dear all, JOI Open Contest 2021 is an IOI-like open competition for students at schools for secondary education. The main purpose of this contest...


Azerbaijan hosted IOI 2019
 The International Olympiad in Informatics in 2019 was held from August 4 to August 11 in Azerbaijan.

The previous Olympiad was held in Japan
 IOI 2018 took place in Japan in September of 2018. The official website has more information.

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 will be held in Indonesia
 Several other Olympiads have also been scheduled, including IOI 2023 in Hungary and IOI 2024 in Egypt.  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, Turkey

  • 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*


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.