
Spring Bay township
- County:
- Woodford County
- County Seat:
- No
- Area (mi²):
- 10.111
- State:
- Illinois
Spring Bay township is located in Woodford County, Illinois. Spring Bay township has a 2025 population of 2,553. Spring Bay township is currently growing at a rate of 0.55% annually and its population has increased by 1.35% since the most recent census, which recorded a population of 2,519 in 2020.
The average household income in Spring Bay township is $86,161 with a poverty rate of 9.49%. The median age in Spring Bay township is 41.8 years: 42.1 years for males, and 41.6 years for females.