This website produces public health profiles for all 3,143 counties in the United States. Each profile includes key indicators of health outcomes, which describes the population health status of a county and factors that have the potential to influence health outcomes, such as health care access and quality, health behaviors, social factors, and the physical environment. The online application includes updated peer county groups, health status indicators, a summary comparison page, and U.S. Census tract data and indicators for sub-populations (age groups, sex, and race/ethnicity) to identify potential health disparities. In this version of CHSI, updated in March 2015, all indicators are benchmarked against those of peer counties, the median of all U.S. counties, and Healthy People 2020 targets.