We studied wild mangoes of Northern Thailand as a primary survey in January 2011. Wild mangoes were found in Loei, Naan, Chiang Rai and Chiang Mai provinces. The final objective of this study is to understand how wild mangoes are utilized in the lives of local people in Northern Thailand. Eighty trees were found, and 19 names were recorded. This seminar is mainly given to report the result of the survey: their distribution, morphology and local names.