This brief provides an overview of family support programs and aims to identify the features and strategies that may be most effective for reaching and engaging black and Latino families, with the ultimate goal of supporting young children's development. We present a synthesis of available research on parent engagement--as well as potential barriers to their engagement--in family support services and programs, and recommendations, for both policymakers and practitioners, for designing, adapting, and evaluating culturally-relevant family support programs and services. (author abstract)