Few studies of religiosity and physical activity (PA) correlates have been conducted; thus, a cross-sectional survey of 367 more and less religious Jewish adolescents' (M age = 12.8 years, SD = 0.9) perceptions of parental and environmental support of PA was conducted at religious day schools in two large American cities. Maternal Support, Environmental Support, and Paternal Non-Support factors were verified through confirmatory factor analysis. Factor scores were analyzed through a 2 x 2 (gender x religiosity level) multivariate analysis of variance. A significant main effect for religiosity was obtained (F = 6.93, p is less than 0.001); however, a main effect for gender and an interaction effect were not. Post hoc discriminant analysis revealed Paternal Non-Support and Environmental Support factors as differentiating more and less religious adolescents. (Contains 1 note.)