IOI
International Olympiad in Informatics – Statistics
Olympiads
No.Year
DatesHostCityContestantsCountries
1198916 May 1989 – 19 May 1989BulgariaPravetz4613
2199015 July 1990 – 21 July 1990Soviet UnionMinsk10025
3199119 May 1991 – 25 May 1991GreeceAthens6823
4199211 July 1992 – 21 July 1992GermanyBonn17151
5199316 October 1993 – 25 October 1993ArgentinaMendoza15543
6199403 July 1994 – 10 July 1994SwedenHaninge18949
7199526 June 1995 – 03 July 1995NetherlandsEindhoven21051
8199625 July 1996 – 02 August 1996HungaryVeszprém22057
9199730 November 1997 – 07 December 1997South AfricaCape Town22163
10199805 September 1998 – 12 September 1998PortugalSetúbal24168
11199909 October 1999 – 16 October 1999TurkeyAntalya-Belek25365
12200023 September 2000 – 30 September 2000ChinaBeijing27872
13200114 July 2001 – 21 July 2001FinlandTampere27274
14200218 August 2002 – 25 August 2002Republic of KoreaYong-In27678
15200316 August 2003 – 23 August 2003United States of AmericaKenosha26569
16200411 September 2004 – 18 September 2004GreeceAthens29176
17200518 August 2005 – 25 August 2005PolandNowy Sącz27672
18200613 August 2006 – 20 August 2006MexicoMérida28274
19200715 August 2007 – 22 August 2007CroatiaZagreb28577
20200816 August 2008 – 23 August 2008EgyptCairo28378
21200908 August 2009 – 15 August 2009BulgariaPlovdiv30178
22201014 August 2010 – 21 August 2010CanadaWaterloo29780
23201122 July 2011 – 29 July 2011ThailandPattaya30378
24201223 September 2012 – 30 September 2012ItalySirmione/Montichiari31081
25201306 July 2013 – 13 July 2013AustraliaBrisbane29977
26201413 July 2014 – 20 July 2014TaiwanTaipei31181
27201526 July 2015 – 02 August 2015KazakhstanAlmaty32283
28201612 August 2016 – 19 August 2016RussiaKazan30880
29201728 July 2017 – 04 August 2017IranTehranTBA