Cass township
- County:
- Fulton County
- County Seat:
- No
- Area (mi²):
- 39.403
- State:
- Illinois
Cass township is located in Fulton County, Illinois. Cass township has a 2026 population of 538. Cass township is currently declining at a rate of 0% annually and its population has decreased by -2.18% since the most recent census, which recorded a population of 550 in 2020.
The median household income in Cass township is $63,864 with a poverty rate of 4.75%. The median age in Cass township is 46.3 years: 34.5 years for males, and 55.3 years for females. For every 100 females there are 116.2 males.