Sunbury township
- County:
- Livingston County
- County Seat:
- No
- Area (mi²):
- 36.495
- State:
- Illinois
Sunbury township is located in Livingston County, Illinois. Sunbury township has a 2026 population of 218. Sunbury township is currently declining at a rate of 0% annually and its population has decreased by -1.8% since the most recent census, which recorded a population of 222 in 2020.
The median age in Sunbury township is 60.8 years: 63.5 years for males, and 59.5 years for females. For every 100 females there are 106.0 males.