Major Industry Scientific research, health care, insurance
Population 748,189 (2005)
Cities Naperville: 141,579 (2005) Downers Grove: 49,094 (2005) Bolingbrook: 68,365 (2005)
People 92% urban; 8.7% age 65+ (ranks 18 of 20 in state; bottom third nationally); 68% married couples, 37% percent married couples with children; 45.2% college educated (ranks third of 20 in state; top third nationally); 73% white collar (ranks second of 20 in state; top third nationally), 18% blue collar (ranks 18 of 20 in state; bottom third nationally) (1990)
Race 80.6% white 5.9% black 8.3% Asian 7.6% Hispanic origin (2004)
Median Household Income $73,191 (2005)
Unique Feature McDonald's Hamburger University
Sources: Congressional Quarterly, U.S. Census Bureau, and 2005 American Community Survey
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