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Census and Demographics
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The City of O'Fallon has experienced significant change and growth over the last fifteen years. The information provided below compares data compiled by the US Census Bureau from the 1990 Census and the 2000 Census. An executive summary of the comparison findings is included first, followed by tables which compare specific characteristics of O'Fallon. Also included are graphs which visually detail these specific characteristics. To download a PDF of the entire Census Report for the City of O'Fallon, click here.
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2008 Special Census Results
29,421 population 11,809 housing units Profile of General Demographic Characteristics for City of O'Fallon, Illinois - 2005 Special Census 2000 Census - Specific Characteristics Information | Description |
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| The City of O’Fallon continues to experience significant change in both size and composition. This report and the detailed attachments illustrate these changes using the 1990 and 2000 Census. | | | | | | | | | | | | |
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