Data Services Staff compiles, maintains and monitors a vast amount of current and historical demographic data at various geographic levels for the five-county Bi-State Region, states of Illinois and Iowa and the Nation. To access demographic data for the Region, please see the Data Clearinghouse page. Or, to access multiple data sets and/or multiple geographies within the Nation, such as census blocks, tracts, voting districts, cities, counties and school districts, visit the Census’ American Factfinder or please contact our Data Services Staff.
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1950 2010 census population (bi state region)
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