Philadelphia township
- County:
- Cass County
- County Seat:
- No
- Area (mi²):
- 36.216
- State:
- Illinois
Philadelphia township is located in Cass County, Illinois. Philadelphia township has a 2026 population of 194. Philadelphia township is currently declining at a rate of -0.51% annually and its population has decreased by -1.02% since the most recent census, which recorded a population of 196 in 2020.
The median age in Philadelphia township is 67.1 years: 67.1 years for males, and 67.2 years for females. For every 100 females there are 208.9 males.