A list of past champions is also maintained on the IHBB Wikipedia page here.

VARSITY DIVISION
International History Bowl
2017 – Hwa Chong Institution, Singapore
2016 – Concordian International School, Bangkok, Thailand
2015 – International Community School, Bangkok, Thailand
2014 – International Community School, Bangkok, Thailand

International History Bee
2017 – Boyang Hou, Hwa Chong Institution, Singapore
2016 – Sirapong Kancvalskul, Concordian International School, Thailand
2015 – Suntiparp Somsak, International Community School, Thailand
2014 – Suntiparp Somsak, International Community School, Thailand

Academic Bowl of Asia
2017 – Hwa Chong Institution, Singapore
2016 – Hankuk Academy of Foreign Studies, Yongin, South Korea

Sports & Entertainment History Bee
2017 – Martin Sasser, Sunway International School, Malaysia
2016 – Frankie Singer, KAIS International School, Japan
2015 – Nitipat Nantavaropas, Ruamrudee International School, Thailand
2014 – Andre Wong, Shanghai American School – Puxi Campus, China

International Geography Bee (held as the Geography Bee of Asia in 2015 and 2016)
2017 –  Alfred Chan, Creative Secondary School, Hong Kong
2016 – Sirapong Kancvalskul, Concordian International School, Thailand
2015 – Suntiparp Somsak, International Community School, Thailand

JUNIOR VARSITY DIVISION
International History Bowl
2017 – Shanghai American School – Puxi Campus, Shanghai, China
2016 – NPS International School, Singapore
2015 – NPS International School, Singapore
2014 – Singapore American School, Singapore

International History Bee
2017 – Vijay Siddharth, NPS International School, Singapore
2016 – Priyankar Kandarpa, NPS International School, Singapore
2015 – Haripoom Prasutchai, International Community School, Thailand
2014 – Nicolas Gruenwald, Singapore American School, Singapore

Academic Bowl of Asia
2017 – NPS International School, Singapore
2016 – NPS International School, Singapore

Sports & Entertainment History Bee
2017 – Dev Belliappa, Overseas Family School, Singapore
2016 – Chansol Park, Shanghai American School – Puxi Campus, China
2015 – Alan Liang, Shanghai American School – Pudong Campus, China
2014 – Jack Liu, Dulwich College Beijing, China

International Geography Bee (held as the Geography Bee of Asia in 2015 and 2016)
2017 – Vijay Siddharth, NPS International School, Singapore
2016 – Vijay Siddharth, NPS International School, Singapore
2015 – Alan Liang, Shanghai American School – Pudong Campus, China

MIDDLE SCHOOL DIVISION
International History Bowl
2017 – International Christian Academy, Parañaque, Philippines
2016 – Shanghai High School International Division, Shanghai, China
2015 – Shanghai High School International Division, Shanghai, China
2014 – Hong Kong International School, Hong Kong

International History Bee
2017 – Elizabeth Enright, Dulwich College Singapore, Singapore
2016 – Wesley Zhang, High School Affiliated to Renmin University of China, China
2015 – Chansol Park, Shanghai American School – Pudong Campus, China
2014 – Chansol Park, Hong Kong International School, Hong Kong

Academic Bowl of Asia
2017 – NPS International School, Singapore
2016 – Shanghai High School International Division, Shanghai, China

Sports & Entertainment History Bee
2017 – Aniket Das, NIST International School, Thailand
2016 – Dev Belliappa, Overseas Family School, Singapore
2015 – Kristian Jacob Chung, Hong Kong International School, Hong Kong
2014 – Neel Date, India International School in Japan, Japan

International Geography Bee (held as the Geography Bee of Asia in 2015 and 2016)
2017 – Pierre-Adam Caudal, Lycée Français de Singapour, Singapore
2016 – Wesley Zhang, High School Affiliated to Renmin University of China, China
2015 – Neel Date, India International School in Japan, Japan

ADULT DIVISION
Sports & Entertainment History Bee
2017 – Mark Rosauer, India International School in Japan, Japan
2016 – Mark Rosauer, India International School in Japan, Japan
2015 – Doug Dysart, Busan Foreign School, South Korea
2014 – Tucker Brabec, Dulwich College Beijing, China