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About IDPH

COVID-19 All Counties Historical Cases, Deaths, and Tested

This dataset contains counts of people tested for COVID-19 in Illinois and their results. This dataset includes all Counties in Illinois, and includes all reported dates through the last reported date.

Data in this section are limited to data collected beginning March 10, 2020 through the date of the last update.

Only Illinois residents are included based on the home address as provided by the medical provider. Only polymerase chain reaction (PCR)-based tests, and Antigen tests are included, and only one test is counted for each individual. Tests are counted on the day the specimen was reported publicly.

All data are provisional and subject to change. Information is updated as additional details are received.

Data Source: Illinois National Electronic Disease Surveillance System

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