International Olympiad in Informatics

IOI 2021 is coming soon

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

Website Results

News

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...

Update on IOI 2021
Dear Friends of IOI, the IC held the Winter meeting in late February. We have the following important information regarding IOI 2021 to share with...

APIO - Call for tasks
As discussed in the APIO delegation meeting in IOI 2019, Indonesia intends to host Asia-Pacific Informatics Olympiad (APIO) 2021 too, as a further...

OII - Open Contest 2020
For the fifth time, the Italian national contest (valid for the selection of the Italian IOI team) will be mirrored into an online contest. The...

IOI Talks #1
Dear IOI Community, in July, we shared information on the IOI mailing list regarding the first edition of IOI Talks. A lot of people registered for...

Events

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 will host IOI 2021
You can read more about the future organizers of the IOI on the Editions page. Future event

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?

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, 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*

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.