Northern Illinois Data by Subject Demographic Characteristics - Households by Household Size Select an Area DuPage County, Illinois   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 222,014 279,344 326,011 57,330 25.8 46,667 16.7   1 person 39,141 57,064 74,471 17,923 45.8 17,407 30.5   2 persons 67,260 86,595 99,256 19,335 28.7 12,661 14.6   3 - 4 persons 81,919 101,929 110,778 20,010 24.4 8,849 8.7   5 or more persons 33,694 33,756 41,506 62 0.2 7,750 23.0 Persons per household (Mean) 2.92 2.54 2.73   SOURCE: U.S. Census Bureau, 1980, 1990, 2000. ::: click here to print this page :::