47 Countries are expected to partisipate in the 15th International Biology Olympiad. 43 National Teams together with 4 observing countries. Competitors are from the followin countriss:
Argentina, Australia, Azerbaijan, Belarus, Belgium, Bulgaria, Canada, China, Chinese Taipei, Cyprus, Czech Republic, Estonia, Finland, Germany, India, Indonesia, Iran, Ireland, Kazakhstan, Korea, Kuwait, Kyrgyzstan, Latvia, Mexico, Moldova, Mongolia, Nigeria, Poland, Romania, Russia, Singapore, Slovak Republic, Slovenia, Sweden, Switzerland, Thailand, The Netherlands, Turkey, Turkmenistan, Ukraine, United Kingdom, USA and Vietnam. and
4 observing countries are: New Zealand, Denmark, Mozambique and Japan.