
Pennsylvania township
- County:
- Mason County
- County Seat:
- No
- Area (mi²):
- 35.846
- State:
- Illinois
Pennsylvania township is located in Mason County, Illinois. Pennsylvania township has a 2025 population of 145. Pennsylvania township is currently declining at a rate of -1.36% annually and its population has decreased by -7.05% since the most recent census, which recorded a population of 156 in 2020.
The average household income in Pennsylvania township is $95,773 with a poverty rate of 3%. The median age in Pennsylvania township is 14 years: 18.1 years for males, and 14 years for females.