Ensuring employment opportunities for people with disabilities impacts positively on their self-esteem, self-confidence, career development, and life independence. Occupational perfor-mance is the main key of maintaining their employment opportunities. Physical performance also impacts their physical health and quality of life. The purpose of this study was to under-stand the correlation between occupational performance of workers with intellectual disabilities (ID). Fifty-one workers with ID employed in gas station and/or auto detailing were recruited and completed occupational and physical performance tests. Data were analyzed by Spearman’s rank correlation coefficient and Kruskal-Wallis test. The results indicate: (1) the significant cor-relations between occupational and physical performance tests (r = -.33 ~ -.63) implies that with higher physical performance, workers with ID would be more efficient with their works; (2) ex-cept the group who work both in gas station and auto detailing had significant difference in walk test, upper and lower muscular strength, there is no other significance among groups. The study concluded that some physical performance and occupational performance are correlated and could be the foundation for future studies in understanding physical conditions and occupation-al performance for workers with ID. Because gas station and auto detailing are labor-intensive working environment, cardiorespiratory endurance, muscular strength and endurance are three domains that are recommended in physical trainings for workers with ID to provide enhanced working efficiency and physical capacity. In addition, studies with big data are needed in order to provide stronger evidence to support of enhancing the support service for labors with ID.