1st edition
IOAI 2024
| Team | Country or region | Team leader | Contestants |
|---|---|---|---|
| Australia 1 |  Australia | Kun Fang | |
| Australia 2 | Qing Zhu | ||
| Bangladesh |  Bangladesh | B M Mainul Hossain | |
| Brazil |  Brazil | Kristofer Stift Kappel | |
| Bulgaria 1 |  Bulgaria | Yoan Georgiev Salambashev | |
| Bulgaria 2 | Radostin Lozanov Cholakov | ||
| Canada |  Canada | Zachary Yu-Long Xie | |
| China 1 |  China | Zheng Zijie | |
| China 2 | Wang Yingkun | ||
| El SalvadorObserver |  El Salvador | — | — |
| Colombia |  Colombia | Emerson Julián León Guerrero | |
| Estonia |  Estonia | Taavi Luik | |
| Hong Kong, China |  Hong Kong, China | On Nei Cheong | |
| Hungary 1 |  Hungary | Ferenc Huszár | |
| Hungary 2 | Szalay Gergő | ||
| Iran |  Iran | Armin Behnamnia | |
| Isle of Man |  Isle of Man | Robert William Kermode Teare | |
| Japan |  Japan | Kazune Sato | |
| Jordan |  Jordan | Yousef Talal Naji Alqasrawi | |
| Kyrgyzstan |  Kyrgyzstan | Makhamadkhan Ishmatov | |
| Letovo |  Russia | Ekaterina Protcko | |
| Macao, China |  Macao, China | Chan Pong Lei | |
| Malaysia |  Malaysia | Tan Nian Wei | |
| Mongolia |  Mongolia | Tsolmon Zundui | |
| Nepal |  Nepal | Chandan Prasad Gupta | |
| Netherlands |  Netherlands | Johan De Geus | |
| Poland 1 |  Poland | Witold Drzewakowski | |
| Poland 2 | Marek Adamczyk | ||
| Romania 1 |  Romania | Miruna-AndreeaZăvelcă | |
| Romania 2 | Daniel Popa | ||
| Singapore 1 |  Singapore | Cheong Kang Hao | |
| Singapore 2 | Huang Shell Ying | ||
| Sweden |  Sweden | Fredrik Göran Niemelä | |
| Chinese Taipei |  Chinese Taipei | Shih-Hung Wu | |
| Tunisia |  Tunisia | Fayez Zouari | |
| Türkiye 1 |  Türkiye | Özgür Özdemir | |
| Türkiye 2 | Kuzey Kantarcıoğlu | ||
| United Arab Emirates |  United Arab Emirates | Mubarak Gwaza Abdu-Aguye | |
| United States 1 |  United States | Yiwei Chen | |
| United States 2 | Alex He | ||
| Vietnam 1 |  Vietnam | Do Phan Thuan | |
| Vietnam 2 | Nguyen Hai Dang |