Welcome to the Northern Illinois University State Data Center (SDC) Network Coordinating agency web site! This site provides access to Illinois data and if you can’t find it here, please feel free to contact us. The State Data Centers were created in 1978 to make data available locally to the public through a network of state agencies, universities, libraries, and regional or local governments.


Click here to see the latest most useful data available to understand the size, scale and scope of the COVID-19 pandemic in Illinois. The state mandated a shelter in place order on March 25th in an attempt to flatten the curve and alleviate the overwhelming need for medical assistance. If you have symptoms, please contact your healthcare provider for instructions. If you are not able to breathe or having other emergency symptoms go directly to the local hospital or call an ambulance.

The 2020 Census needs your participation!

The 2020 Census is open! The time to complete is dependent upon the number of household members, but takes only a few minutes. Click here to see how many households have responded in your neighborhood! Responses on the form require all household members to be included regardless of relationship. All Census operations have been postponed 120 days meaning Census takers will be knocking on doors of those who have yet to respond starting August 11th and all data collection ends on October 31st.

Annual Population Trends and Rankings

Illinois has been losing population primarily driven by the changing demographics, especially in Cook County. The Census Bureau’s population estimates look at the birth and death records in each county along with migration data of who moved where in the last year. The data shown here is the result of those population estimates to use as a more sensitive gauge of population change in our communities.