It later became the headquarters for the police department, complete with indoor shooting range, before becoming the current city offices.Evidence of this change is found on University Avenue where the keystone above the door reads "CFD" with the "F" later becoming a "P" for police.The average household size was 2.23 persons and the average family size was 2.95. For every 100 females age 18 and over, there were 101.9 males.Of all individuals, 17.8% were under age 18, 31.7% from 18 to 24, 26.7% from 25 to 44, 15.4% from 45 to 64, and 8.4% were age 65 or older. The median income for a household in the city was ,795, and the median income for a family was ,628.Males had a median income of ,574 versus ,186 for females. About 8.1% of families and 22.1% of the population were below the poverty line, including 13.0% of those under age 18 and 5.6% of those age 65 or over.The 2005 median home value was 1,000, a 6.8% increase from 2004, according to Money Magazine.The city also hosts the state Science Olympiad competition every year.The University of Illinois is next expected to host the National competition in 2010. According to the United States Census Bureau, the city has a total area of 17.0 square miles (44.1 km²), of which, 17.0 square miles (44.0 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.12%) is water.
The building replaces the original city building which sat on the same site until 1937.Both the city and county name were derived from Champaign County, Ohio.On September 22, 1985, Champaign hosted the first Farm Aid concert at the University of Illinois' Memorial Stadium.Champaign's major employers include The University of Illinois, Champaign Unit #4 School District, Parkland College, Kirby Foods, Christie Clinic, Devonshire Group LLC, Amdocs, City of Champaign, Hobbico and Horizon Hobby.Other major employers outside the city limits of Champaign that employ significant numbers of Champaign residents include Kraft Foods (unincorporated Champaign Township), Carle Clinic Association and Provena Health (both in Urbana).The ornate decoration, art deco architecture, and copper roof distinguish the building.