Primary tabs

Other Access

The information on this page (the dataset metadata) is also available in these formats.


via the DKAN API

COVID-19 Daily Rolling Average Case and Death Rates

This is the place to look for important information about how to use this dataset, so please expand this box and read on!

This is the source data for some of the metrics available at

For all datasets related to COVID-19, see

This dataset is a companion to the COVID-19 Daily Cases and Deaths dataset ( The major difference in this dataset is that the cases, deaths, and corresponding rates per 100,000 population are not those for the single date indicated. They are rolling averages for the seven-day period ending on that date. This rolling average is used to account for fluctuations that may occur in the data, such as fewer cases being reported on weekends, and small numbers. The intent is to give a more representative view of the ongoing COVID-19 experience, less affected by what is essentially noise in the data.

All rates are per 100,000 population in the indicated group, or Chicago, as a whole, for “Total” columns.

Only Chicago residents are included based on the home address as provided by the medical provider.

Confirmed cases are counted on the date the test specimen was collected. Deaths are those occurring among confirmed cases based on the day of death. Demographic data are based on what is reported by medical providers and is not verified by CDPH.

Denominators are from the U.S. Census Bureau American Community Survey 1-year estimate for 2018 and can be seen in the Citywide, 2018 row of the Chicago Population Counts dataset (

All data are provisional and subject to change. Information is updated as additional details are received and it is, in fact, very common for recent dates to be incomplete and to be updated as time goes on. At any given time, this dataset reflects cases and deaths currently known to CDPH.

Numbers in this dataset may differ from other public sources due to definitions of COVID-19-related cases and deaths, sources used, how cases and deaths are associated to a specific date, and similar factors.

Data Source: Illinois National Electronic Disease Surveillance System, Cook County Medical Examiner’s Office, U.S. Census Bureau American Community Survey

Release Date
Homepage URL
Contact Name
Jonathan Levy
Contact Email
Public Access Level
POD Theme
Health & Human Services
Harvested from
Harvest Source
Harvest Source URI
Last Harvest PerformedFri, 10/30/2020 - 00:28