The Illinois Public Health Community Map web feature makes information about the quality of health in communities available to the public, and highlights socioeconomic and racial/ethnic inequities that may exist. Data are presented and displayed geographically by Illinois region, county, and by sub-region and zip code for Cook County and Chicago. A major focus of the website is on access to health care. An array of measures are presented that can serve as a screening tool for identifying problems involving access to primary care and other quality issues. Census data on age, median income, race/ethnicity, and education are integrated into the site and can be displayed geographically. These data give a unique view of Illinois health care issues at the community level. An “export data” feature allows users to export data on selected measures. The Map provides data on overall emergency room use as well as use associated with diabetes and asthma, preventable hospitalizations, hospital readmissions and geographic variation for these measures across the state. The Map is updated annually, but often several times per year with new data.