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| | Encyclopedia: Willowbrook, DuPage County, Illinois |
 | | It should not be confused with Willowbrook, Will County, Illinois, an unincorporated census-designated place, or Willowbrook High School, which is located in nearby Villa Park, Illinois. |
 | | The United States Census Bureau (officially Bureau of the Census) is a part of the United States Department of Commerce. |
 | | There are 4,178 households out of which 21.0% have children under the age of 18 living with them, 45.0% are married couples living together, 7.4% have a female householder with no husband present, and 45.6% are non-families. |
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