Grounded in the conceptual framework of the Sport Commitment Model and previous empirical studies conducted in Western countries, this study was designed to (a) test and validate a Thai version of the Athlete Opinion Survey to assess components of the Sport Commitment Model in Thai youth athletes and (b) examine structural relationships among various constructs of the Sport Commitment Model as assessed by the Thai version of the Athlete Opinion Survey. Survey data were collected from 1,704 Thai youth athletes and analyzed via structural equation modeling methodologies to establish evidence for validity and measurement reliability. Results from various analyses indicated adequate support for the hypothesized factorial structure and acceptable reliability estimates of the Thai version of the Athlete Opinion Survey subscales. Moreover, modeling analyses showed empirical support for the hypothesized structural relationships underlying the Sport Commitment Model in the Thai youth athlete population. The findings from this study have implications for a better understanding of sport commitment in different cultural settings. (Contains 5 tables and 2 figures.)