Salem township
- County:
- Marion County
- County Seat:
- No
- Area (mi²):
- 35.78
- State:
- Illinois
Salem township is located in Marion County, Illinois. Salem township has a 2026 population of 922. Salem township is currently growing at a rate of 0.11% annually but its population has decreased by -2.23% since the most recent census, which recorded a population of 943 in 2020.
The median household income in Salem township is $71,250 with a poverty rate of 4.69%. The median age in Salem township is 51.4 years: 51.2 years for males, and 51.5 years for females. For every 100 females there are 104.6 males.