The prevalence of overweight in Mexican American children has been increasing at a steady rate over the past few years. People of Mexican origin make up the largest proportion of the Hispanic population, which has been reported by the U.S. Census Bureau to be the fastest growing ethnic group in the United States. The purpose of this integrative review was to examine and summarize the current research on parental perceptions of childhood overweight in the Mexican American population. Four main themes evolved as a result of the data analysis: parental perception of overweight, parental practices, household food security status, and acculturation. School nurses are in a position to influence children in improving their nutritional status and increasing their physical activity. Understanding cultural values and beliefs regarding health status and overweight of Mexican American families should be a priority for school nurses. Identifying food-related parenting styles and the concept of acculturation should also be considered prior to incorporating relevant interventions in the school setting. (Contains 1 table.)