This longitudinal study concerns initial levels, trajectories of growth, and associationsof positive youth development (PYD) with parental warmth and behavioral control fromearly adolescence to young adulthood. Participants included 1338 adolescents (M = 13.25,SD = 1.04, years; 50% girls) from nine countries trichotomized by income level based onWorld Bank groupings of economies as well as cultural, sociological, and psychologicalconsiderations. Composite measures of PYD at ages 13, 15, 16, 18, and 21 were createdfrom adolescent-report EPOCH dimensions of engagement, perseverance, optimism,connectedness, and happiness. Adolescents reported a high average initial level of PYD(3.50 on a 4-point scale) at 13 years of age; however, developmental trajectories of eachincome-level group differed with little within-group variation across age. Multigrouplatent growth curve models examined associations of family-level and parent-specificdimensions of warmth and control with intercepts and trajectories of PYD. Parentalwarmth was consistently associated with higher PYD intercepts in all three countryincome levels, whereas control showed varied effects. PYD followed similar trajectoryslopes across the three country income levels; parental warmth was consistently associ-ated with growth, whereas parental control showed nuanced associations with parentand country. Warmth appears to act as a common protective correlate of adolescentPYD, whereas control appears to constitute a protective correlate in some cultural con-texts but a risk correlate in other cultural contex