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 2026 population of 337. Salem township is currently growing at a rate of 0.3% annually but its population has decreased by -0.88% since the most recent census, which recorded a population of 340 in 2020.
The median household income in Salem township is $60,192 with a poverty rate of 36.42%. The median age in Salem township is 35 years: 31.6 years for males, and 45.6 years for females. For every 100 females there are 182.2 males.