Belvidere /ˈbɛlvɪdɪər/ is a city in Boone County, Illinois, United States. The population was 25,585 as of the 2010 census. It is the county seat of Boone County. Belvidere is part of the Rockford, Illinois Metropolitan Statistical Area.
Belvidere is located at 42°15′17″N 88°50′39″W / 42.25472°N 88.84417°W / 42.25472; -88.84417 (42.254758, -88.844093), and sits approximately 800 feet (240 m) above sea level. Located in north central Illinois, Belvidere is approximately 75 miles (121 km) northwest of the downtown of Chicago, and approximately 12 miles (19 km) east of Rockford. Belvidere is divided by the Kishwaukee River.
According to the 2010 census, Belvidere has a total area of 12.312 square miles (31.89 km), of which 12.08 square miles (31.29 km) (or 98.12%) is land and 0.232 square miles (0.60 km) (or 1.88%) is water.
Belvidere is located in north central Illinois and is 75 miles from downtown Chicago on Routes 20, 76 and the Northern Illinois Toll road, with the Kishwaukee River dividing the town. Belvidere is an industrial community surrounded by prosperous farms. It is the County Seat with an estimated 2006 county population of over 52,000. The altitude is 800 feet above sea level, average temperatures are: 73 degrees F in the summer; 24 degrees F in the winter, and the average rainfall is 33.3 inches, and the average annual snowfall is 35.3 inches.
As of the census of 2000, there were 20,820 people, 7,531 households, and 5,324 families residing in the city. The population density was 2,295.3 people per square mile (886.3/km²). There were 7,970 housing units at an average density of 878.6 per square mile (339.3/km²). The racial makeup of the city was 64.53% White, 1.15% African American, 0.37% Native American, 0.45% Asian, 0.02% Pacific Islander, 11.57% from other races, and 1.92% from two or more races. Hispanic or Latino of any race were 26.07% of the population.
There were 7,531 households out of which 38.7% had children under the age of 18 living with them, 53.9% were married couples living together, 11.9% had a female householder with no husband present, and 29.3% were non-families. 24.8% of all households were made up of individuals and 11.2% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.26.
In the city the population was spread out with 29.7% under the age of 18, 8.8% from 18 to 24, 31.2% from 25 to 44, 18.1% from 45 to 64, and 12.2% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 97.2 males. For every 100 females age 18 and over, there were 94.7 males.
The median income for a household in the city was $42,529, and the median income for a family was $50,601. Males had a median income of $37,116 versus $24,454 for females. The per capita income for the city was $17,804. About 7.8% of families and 10.0% of the population were below the poverty line, including 12.0% of those under age 18 and 8.0% of those age 65 or over.