Frederick township
- County:
- Schuyler County
- County Seat:
- No
- Area (mi²):
- 13.807
- State:
- Illinois
Frederick township is located in Schuyler County, Illinois. Frederick township has a 2026 population of 150. Frederick township is currently declining at a rate of -0.66% annually and its population has decreased by -2.6% since the most recent census, which recorded a population of 154 in 2020.
The median age in Frederick township is 43.9 years: 43.5 years for males, and 47.9 years for females. For every 100 females there are 195.7 males.