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Possible online services disruption due to Internet related outage

A worldwide technology outage is causing disruption to some State of Illinois online systems.  We are aware of this issue and are diligently working on restoration.

Illinois Population Data

Total Population of Illinois, Chicago, and Illinois Counties: 1950-2020

State/City/County 1950 1960 1970 1980 1990 2000 2010 2020

Source: U. S. Department of Commerce, Census 2020 Redistricting Data (Public Law 94-171)

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