This User Guide contains information on the Behavioral Risk Factors Surveillance System (BRFSS). The BRFSS is a state-based system of health surveys that collects information on health risk behaviors, preventive health practices, and health care access primarily related to chronic disease and injury. The survey is conducted by the state health departments with technical and methodological assistance provided by the U.S. Centers for Disease Control and Prevention (CDC). The BRFSS is an annual cross-sectional telephone-based survey that provides national, state, and limited county-level data. It is designed to allow the CDC, state health departments, and other health and education agencies to monitor risk behaviors related to chronic diseases, injuries and death, identify emerging health problems, establish and track health objectives, and develop and evaluate public health policies and programs. The core survey includes two questions that are used to identify the population with disabilities with other optional modules that target disability-related issues.