The Youth Risk Behavior Survey (YRBS) was developed by the Centers for Disease Control and Prevention to measure the major health risk behaviors performed by youth. These health risk behaviors include: behaviors that contribute to intentional and unintentional injuries; the use of tobacco, alcohol, and other drugs; sexual behaviors that contribute to unintended pregnancy and sexually transmitted diseases; unhealthy dietary behaviors; and inadequate physical activity. These behaviors are known to cause premature morbidity and mortality among youth, leading to chronic disease and death among adults. In Wyoming, the 2003 statewide high school survey was completed by 1,552 students in 45 public schools and by 1,945 middle school students. Each of the content area sections includes a ?Wyoming Fast Facts? section, charts of the middle school survey results, and charts of the high school survey results. Somecharts present results for only one question, and other charts present results for more than one question. The single question bar charts show the results by gender and by grade in the same chart. Questions that are presented in multiple question bar charts are presentedin two different charts: one with gender breakdowns, and one with grade breakdowns. Results indicate that while most students are engaging in positive health behaviors, challenges remain in the areas of seat belt and bicycle helmet use, use of alcohol and marijuana, and healthy diet and physical activity. (Contains 3 appendices.)