Northern Illinois Data by Subject Demographic Characteristics - Households by Household Size Select an Area Chicago, Illinois PMSA* * The Chicago, Illinois Primary Metropolitan Statistical Area (PMSA) consists of Cook, DeKalb, DuPage, Grundy, Kane, Kendall, McHenry and Will counties.   Boone County   Bureau County   Carroll County   Cook County   DeKalb County   DuPage County   Grundy County   Henry County   JoDaviess County   Kane County   Kankakee County   Kendall County   Lake County   LaSalle County   Lee County   McHenry County   Mercer County   Ogle County   Putnam County   Rock Island County   Stephenson County   Whiteside County   Will County   Winnebago County   Chicago PMSA   Quad Cities MSA   Rockford MSA   State of Illinois Household Size 1980 1990 2000 Change 1980-1990 Change 1990-2000 Number Percent Number Percent Total households 2,533,889 2,671,540 2,972,373 137,651 5.4 300,833 11.3   1 person 619,086 683,728 782,934 64,642 10.4 99,206 14.5   2 persons 723,760 772,247 849,249 48,487 6.7 77,002 10.0   3 - 4 persons 806,335 858,934 916,972 52,599 6.5 58,038 6.8   5 or more persons 384,708 356,631 423,218 -28,077 -7.3 66,587 18.7 Persons per household (Mean) 2.91 2.59 2.79   SOURCE: U.S. Census Bureau, 1980, 1990, 2000. ::: click here to print this page :::