List of countries engaged in IESO:

Argentina

Australia

Austria,  www.asi.edu.au

Austria

Belarus

Bangladesh, www.byei.org/neo

Brazil,  www.obap.agr.br

Cambodia

China

Czech Republic, www.zemepisnaolympiada.cz

Germany, www.die-deutsche-olympiade-der-geowissenschaften.de

Estonia

Finland

France

Haiti

India, www.geosocindia.org/

Indonesia,  http://www.toiki.or.id/

Israel

Italy, http://olimpiadi.anisn.it/ieso/

Japan, http://jeso.jp/index.html

Kazakhstan, http://zhas-geolog.kz/olympics/ 

Kazakhstan

Kuwait

Lithuania

Malawi

Malaysia, http://myeso.com.my/

Nepal

Norway, http://www.geologi.no/geofag/geofag-ol

Pakistan

Philippines

Romania

Russia

South Korea

Spain, Olimpiada Espanola de Geologia website

Sri Lanka,

Taiwan,  http://www.ieso.cc/

Thailand,

Ukraine,

USA, USA E.S.O. website