Penn
- County:
- Shelby County
- County Seat:
- No
- Area (mi²):
- 23.756
- State:
- Illinois
Penn is located in Shelby County, Illinois. Penn has a 2025 population of 82 . Penn is currently declining at a rate of -1.2% annually and its population has decreased by -4.65% since the most recent census, which recorded a population of 86 in 2020.
The median age in Penn is 48.9 years: 0 years for males, and 0 years for females. For every 100 females there are 100.0 males.