There is a lack of validated instruments to measure gratitude in Vietnamese adolescents; this issue is regarded as a significant impediment to progress in implementing empirical research on the gratitude of Vietnamese adolescents. The aim of this study, therefore, was to validate the Vietnamese translation of the Gratitude Questionnaire (GQ) and the Revised Short Gratitude, Resentment, and Appreciation Test (S-GRAT), using two independent samples of Vietnamese adolescents in two studies. In Study 1, Sample 1 (N = 365, female n = 173) completed the Vietnamese GQ (GQ-VN) and S-GRAT (S-GRAT-VN). Confirmatory factor analysis showed that the 5-item version of the GQ-VN and the 15-item version of the S-GRAT-VN fitted the data adequately. Both instruments showed satisfactory internal consistency. In Study 2, Sample 2 (N = 202, female n = 93) completed the GQ-VN and S-GRAT-VN, along with the Satisfaction With Life Scale. The GQ-VN and S-GRAT-VN were found to be positively correlated with each other and with the construct of life satisfaction, confirming the convergent and predictive validity of the two questionnaires. All the findings support the validity and reliability of the Vietnamese GQ and S-GRAT in a sample of Vietnamese adolescents. These two instruments, therefore, may facilitate the evaluation of factors associated with adolescent dispositional gratitude in Vietnamese settings.