International Chemistry Olympiad

The International Chemistry Olympiad (IChO) is a chemistry-themed International Olympiad. The first IChO was held in 1968. It has gradually expanded to over 80 countries from all continents. The competition takes place each year organized by a different host country observing the regulations and traditions of the IChO.

The IChO is intended to stimulate the activities of students interested in chemistry by a way of the independent and creative solution of chemical problems. It encourages cooperation and international understanding.^[1]

Overview

No.	Host country & city	Time
1^st IChO	Prague, Czechoslovakia	June 18 – 21, 1968
2^nd IChO	Katowice, Poland	June 16 – 20, 1969
3^rd IChO	Budapest, Hungary	July 1 – 5, 1970
4^th IChO	Moscow, Soviet Union	July 1 – 10, 1972
5^th IChO	Sofia, Bulgaria	July 1 – 10, 1973
6^th IChO	Bucharest, Romania	July 1 – 10, 1974
7^th IChO	Veszprem, Hungary	July 1 – 10, 1975
8^th IChO	Halle, East Germany	July 10 – 19, 1976
9^th IChO	Bratislava, Czechoslovakia	July 4 – 14, 1977
10^th IChO	Torun, Poland	July 3 – 13, 1978
11^th IChO	Leningrad, Soviet Union	July 2 – 11, 1979
12^th IChO	Linz, Austria	July 13 – 23, 1980
13^th IChO	Burgas, Bulgaria	July 13 – 23, 1981
14^th IChO	Stockholm, Sweden	July 3 – 12, 1982
15^th IChO	Timisoara, Romania	July 2 – 11, 1983
16^th IChO	Frankfurt, West Germany	July 1 – 10, 1984
17^th IChO	Bratislava, Czechoslovakia	July 1 – 8, 1985
18^th IChO	Leiden, Netherlands	July 6 – 15, 1986
19^th IChO	Veszprem, Hungary	July 6 – 15, 1987
20^th IChO	Espoo, Finland	July 2 – 9, 1988
21^st IChO	Halle, East Germany	July 2 – 10, 1989
22^nd IChO	Paris, France	July 8 – 17, 1990
23^rd IChO	Lodz, Poland	July 7 – 15, 1991
24^th IChO	Pittsburgh, United States	July 11 – 22, 1992
25^th IChO	Perugia, Italy	July 11 – 22, 1993
26^th IChO	Oslo, Norway	July 3 – 11, 1994
27^th IChO	Beijing, China	July 13 – 20, 1995
28^th IChO	Moscow, Russian Federation	July 14 – 23, 1996
29^th IChO	Montreal, Canada	July 13 – 22, 1997
30^th IChO	Melbourne, Australia	July 5 – 14, 1998
31^st IChO	Bangkok, Thailand	July 4 – 11, 1999
32^nd IChO	Copenhagen, Denmark	July 2 – 11, 2000
33^rd IChO	Mumbai, India	July 6 – 15, 2001
34^th IChO	Groningen, Netherlands	July 5 – 14, 2002
35^th IChO	Athens, Greece	July 5 – 14, 2003
36^th IChO	Kiel, Germany	July 18 – 27, 2004
37^th IChO	Taipei, Chinese Taipei	July 16 – 25, 2005
38^th IChO	Gyeongsan, South Korea	July 1 – 11, 2006
39^th IChO	Moscow, Russian Federation	July 15 – 24, 2007
40^th IChO	Budapest, Hungary	July 12 – 21, 2008
41^st IChO	Cambridge, United Kingdom	July 18 – 27, 2009
42^nd IChO	Tokyo, Japan	July 19 – 28, 2010
43^rd IChO	Ankara, Turkey	July 9 – 18, 2011
44^th IChO	Washington, United States	July 21 – 30, 2012
45^th IChO	Moscow, Russian Federation	July 15 – 24, 2013
46^th IChO	Hanoi, Vietnam	July 21 – 29, 2014
47^th IChO	Baku, Azerbaijan	July 20 – 29, 2015
48^th IChO	Tbilisi, Georgia	July 23 – August 1, 2016
49^th IChO	Nakhom Pathom, Thailand	July 6 – 17, 2017
50^th IChO	Bratislava, Slovakia – Prague, Czech Rep.	July 19 – 29, 2018
51^st IChO	Paris, France	July 21 – 30, 2019
52^th IChO	Istanbul, Turkey (online)	July 23 – 30, 2020
53^th IChO	Osaka, Japan (online)	July 24 – August 2, 2021
54^th IChO	Tianjin, China (online)	July 10 – 18, 2022
55^th IChO	Zürich, Switzerland	July 16 – 25, 2023^[2]
56^th IChO	Riyadh, Saudi Arabia	July 21 – 31, 2024
57^th IChO	United Arab Emirates	July, 2025
58^th IChO	Uzbekistan	2026