Salem
- County:
- McCook County
- County Seat:
- No
- Area (mi²):
- 1.25
- State:
- South Dakota
Salem is a city located in McCook County, South Dakota. Salem has a 2026 population of 1,315. Salem is currently declining at a rate of -1.28% annually and its population has decreased by -0.98% since the most recent census, which recorded a population of 1,328 in 2020.