
Salem township
- County:
- Marion County
- County Seat:
- No
- Area (mi²):
- 35.374
- State:
- Illinois
Salem township is located in Marion County, Illinois. Salem township has a 2025 population of 331. Salem township is currently declining at a rate of -0.6% annually and its population has decreased by -2.36% since the most recent census, which recorded a population of 339 in 2020.
The average household income in Salem township is $98,404 with a poverty rate of 32.25%. The median age in Salem township is 34.9 years: 31.6 years for males, and 45.1 years for females.