Green banking encourages sustainable economic development and stimulates environmentally friendly activities. The objective of this study is to assess determinants of green banking adoption in Vietnam. Data of the study was collected through a survey of officials and employees at commercial banks in Vietnam. The results of correlation and regression analysis indicate that the influence of macro factors on the level of green banking is the strongest, followed by the bank's financial capacity, government's supportive policies and green investment needs of business organizations. Conversely, the capacity of officials and the bank leader awareness on green banking do not significantly affect the level of green banking adoption in Vietnam.