The U.S. Census counts every resident in the United States. It is mandated by Article I, Section 2 of the Constitution and takes place every 10 years.  The data collected by the decennial census determine the number of seats each state has in the U.S. House of Representatives and is also used to distribute billions in federal funds to local communities.

Staff assists with preparation for and promotion of the decennial Census, and compiles, maintains and monitors current and historical Census data at various geographic levels for the five-county Bi-State Region, states of Illinois and Iowa, and the Nation.  Users can access this data on our Data Warehouse, GreaterQCRegion.org.  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: http://factfinder2.census.gov.

For more information visit http://www.census.gov/history/www/programs/demographic/decennial_census.html or contact our Data Services Staff.

2010 Census Demographic Profile Summaries (DP-1) for each county and municipality in the Region are also available.

2000 Census Demographic Profile Summaries (DP-1) for each county and municipality in the Region are also available.