was 65 years of age or older. The average household size was 3.59 and the average family size was 2.88. The city's age distribution consisted of 22.0% under the age of 18, 9.2% from 18 to 24, 23.7% from 25 to 44, 29.8% from 45 to 64, and 15.3% who were 65 years of age or older. The median age was 40.9 years. For every 100 females, there were 82.1 males. For every 100 females age 18 and over, there were 77.3 males. The median income for a household in the city was $70,306, and the median income for a family was $85,357. Males had a median income of $51,563 versus $42,955 for females. The per capita income for the city was $30,318. About 11.2% of families and 12.3% of the population were below the poverty line, including 12.7% of those under age 18 and 10.8% of those age 65 or over. Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race. Arts and culture In 2006, Country Club Hills became the location of Chicago metropolitan area's largest Wal-Mart Supercenter at over . The development was an anchor to the first phase of the Gatling Square Mile, Cook County's largest parcel of undeveloped land at about . Country Club Hills is part of the Grande Prairie Public Library District. The Grande Prairie Public Library is located in nearby Hazel Crest. Government Country Club Hills is divided between two congressional districts. Nearly all of the city is in Illinois's 2nd congressional district, but some small areas along the city's western edge – primarily between 179th and 183rd Streets west of Lavergne Avenue – are in the 1st district. Education Since 1967, Country Club Hills has been home to Bremen Community High School District 228's Hillcrest High School, located at 175th and Pulaski (Crawford). The school has been on an academic watch list for 6 years, and is currently in a "restructuring plan" to increase school academics. Notable people Danny Clark, linebacker for the New York Giants Marquice Cole, defensive back for the New York Jets Herb Coleman, American player of gridiron football Dee Dee Davis, actress, best known in her role as Bryana “Baby Girl” Thomkins on the Bernie Mac Show Koko Taylor, blues singer See also List of U.S.