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  Illinois Data  

2000 Census: Redistricting Data Summary Files

"Every ten years, the U.S. Census collects statistical information about households, education, income, homeownership and more. On March 14, the U.S. Census Bureau delivered to Governor George H. Ryan and the majority and minority leaders of the Illinois General Assembly the offical census 2000 Redistricting Data Summary File for Illinois."

This census data, under Public Law 94-171, allows state officials to realign congressional and state legislative districts, taking into account population shifts since the 1990 census, and assuring equal representation for Illinoisans in compliance with the "one-person, one-vote" principle of the 1965 Voting Rights Act. This is the first data being provided to the State resulting from the official 2000 census.

Also released are the first population counts for small areas, and the first race and Hispanic-origin data from Census 2000.

  2000 Census Highlights  

  • Illinois total population (released April 1, 2000)
  • Increase in total population over 1990 Census
  • Percentage growth of Illinois population 1990-2000
  • 2000 Census City of Chicago population
  • Increase in City of Chicago population over 1990
  • Percentage growth of City of Chicago population 1990-2000
12,419,293
988,691
8.6%
2,896,016
112,290
4.0%

Ten largest counties
2000 Census Population

  1. Cook County
  2. DuPage County
  3. Lake County
  4. Will County
  5. Kane County
  6. Winnebago County
  7. McHenry County
  8. Madison County
  9. St. Clair County
  10. Sangamon County
5,376,741
904,161
644,356
502,266
404,119
278,418
260,077
258,941
256,082
188,951

Fastest growing counties by net change
1990-2000 Net Change

  1. Cook County
  2. Will County
  3. Lake County
  4. DuPage County
  5. Kane County
  6. McHenry County
  7. Winnebago County
  8. McLean County
  9. Kendall County
  10. DeKalb County
271,674
144,953
127,938
122,495
86,648
76,836
25,505
21,253
15,131
11,037

Ten largest cities2000 Census Population

  1. Chicago, City of
  2. Rockford, City of
  3. Aurora, City of
  4. Naperville, City of
  5. Peoria, City of
  6. Springfield, City of
  7. Joliet, City of
  8. Elgin, City of
  9. Waukegan, City of
  10. Cicero, City of
2,896,016
150,115
142,990
128,358
112,936
111,454
106,221
94,487
87,901
85,616

Fastest growing cities by net change
1990-2000 Net Change 2000 Population

Net Change2000 Population
  1. Chicago, City of
  2. Aurora, City of
  3. Naperville, City of
  4. Joliet, City of
  5. Palatine, Village of
  6. Waukegan, City of
  7. Cicero, City of
  8. Elgin, City of
  9. Bartlett, Village of
  10. Lake in the Hills, Village of
112,290
43,409
43,407
29,385
26,226
18,509
18,180
17,473
17,311
17,286
2,896,016
142,990
128,358
106,221
63,178
87,812
85,616
94,487
36,684
23,136

U.S. and State Resident Population & Apportionment Counts

"The first results from Census 2000, resident population and apportionment population for each state and the United States, were released by the U.S. Census Bureau on December 28, 2000. The resident population count of the U.S. on April 1, 2000 was 281,421,906 -- a 13.2 percent increase and 32.7 million more persons than the 1990 Census count of 248,709,873...."

  Census Profile  

  Download the Large Redistricting Files  

These files are intended for experienced users of census data, compressed files, and spreadsheet/database software. It provides quick access to data users, such as State Data Centers and news media, who need to begin their analysis immediately upon data release. Due to the size of the files, the user should have a fast file transfer capability.

Once uncompressed, the data are in a flat ASCII format. The geographic file is in a fixed-field format; the two data files are in comma delimited format. No software is provided. Users need to unzip the compressed file after downloading, then import it into the spreadsheet/database software of their choice for data analysis and table presentation.

These files contain the large redistricting files from the 2000 Census and will take a considerable amount of time to download.

IL00001upl.zip (6.2MB)IL00002upl.zip (5.7MB)ILgeoupl.zip (13.5MB)

  Illinois Data on Federal Census Site  

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