
Belvidere township
- County:
- Boone County
- County Seat:
- No
- Area (mi²):
- 36.103
- State:
- Illinois
Belvidere township is located in Boone County, Illinois. Belvidere township has a 2025 population of 29,531. Belvidere township is currently growing at a rate of 0.4% annually and its population has increased by 0.58% since the most recent census, which recorded a population of 29,361 in 2020.
The average household income in Belvidere township is $100,119 with a poverty rate of 12.21%. The median age in Belvidere township is 41.2 years: 40.1 years for males, and 41.9 years for females.