International Olympiad in Informatics

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.

Website Results

News

IIOT Open Contests 2022/23
For the seventh time, the International Informatics Olympiad in Teams is taking place and will be mirrored into online rounds. These contests have...

Call for projects
Dear all, We are opening this year's Call for projects.

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...

Events

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?

Beginners

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.

Statistics

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

Journal

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

Organization

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.

OrganizationInfo Members

About

The IOI is one of five international science olympiads. The primary goal of the IOI is to stimulate interest in informatics (computing science) and information technology.

Another important goal is to bring together exceptionally talented pupils from various countries and to have them share scientific and cultural experiences.