Belvidere is a city located in Boone County, Illinois, United States. It is part of the Rockford metropolitan area and has a rich history dating back to the 1830s. The city is known for its charming downtown area, which features various shops, restaurants, and parks. The population of Belvidere is approximately 25,000 residents. The city is also home to the Belvidere School District, which serves local students, and the Belvidere Park District, which offers recreational activities and facilities for the community.