Bruce Rauner, Governor

State Links Skip to Content Skip to State Links

 Health & Safety
 Family & Home
 About Illinois

Stay Informed

Your Government

Illinois Flag Honors

Inspector General

 IGNN: State/All Press Release

The State of Illinois News page provides access to the Illinois Government News Network and all state press releases.

February 15, 2011

Illinois Population Up 3.3 Percent in 2010 Census
Illinois Remains 5th Largest State in Nation

CHICAGO – Illinois Department of Commerce and Economic Opportunity (DCEO) Director Warren Ribley today announced results of the 2010 census for the state of Illinois. According to the data, over 12.8 million (12,830,632) people live in Illinois, up 3.3 percent since 2000. The 2010 Census represented the most massive participation movement ever in the country with 74 percent of households voluntarily returning their census forms by mail. Illinois had a 76 percent participation rate, above the national average.

“The Census is an important tool to ensure communities of every size get their fair share of funding for vital services and programs, and to provide accurate data to plan for the future,” said Director Ribley. “Thanks to our collaboration with community organizations throughout the state, this year’s census yielded one of the largest response rates ever.”

The top five counties in Illinois based on population are: Cook, DuPage, Lake, Will, and Kane. The five largest cities are Chicago (2,695,598), Aurora (197,899), Rockford (152,871), Joliet (147,433), and Naperville (141,853), with Springfield (116,250), Peoria (115,007), Champaign (81,055), Bloomington (76,610) and Decatur (76,122) having the largest populations downstate.

Cook County continues to have the highest population in the state with nearly 5.2 million residents (5,194,675), a decrease of 3.4 percent. This includes approximately 2.7 million residents in the City of Chicago, which saw a 6.9 percent decrease from 2000.

Illinois has seen an increase in minorities in the state over the last decade. Asians experienced the largest increase - 163,331 residents since 2000, a 38.6 percent increase. People reporting two or more races on their census form increased by 54,966 or 23.4 percent. People reporting Hispanic or Latino origin increased by nearly 500,000 residents, or 32.5 percent. The voting age population in Illinois, people 18 years and over, increased by over 500,000 residents, or 5.8 percent.

The U.S. Census Bureau conducts the census every 10 years, as required by the U.S. Constitution. Census questionnaires were mailed or delivered to every household in the United States beginning in early 2010. In December 2010, apportionment data was announced; this information is used to determine the number of Congressional seats each state receives.

The data received today, known as the redistricting data, will allow state officials to realign congressional and state legislative districts as part of the redistricting process, taking into account population shifts since the last census and assuring equal representation for their constituents.

For more info on the 2010 Census, visit http://Census.Illinois.gov.


News Categories

 Governor's Office
 Lt. Governor's Office
 Economic Development
 Flag Honors
 Health/Human Services
 Opportunity Returns

News Resources

 Search the News
 IIS Radio News
 RSS News Feeds
 e-News Subscriptions
 Communications Office
 Privacy Statement


Sign up for an e-news subscription
Copyright © 2017 State of Illinois Site Map | Illinois Privacy Info | Kids Privacy | Web Accessibility | Contact Us