Lennox
- County:
- Lincoln County
- County Seat:
- No
- Area (mi²):
- 1.746
- State:
- South Dakota
Lennox is a city located in Lincoln County, South Dakota. Lennox has a 2026 population of 2,539. Lennox is currently growing at a rate of 1.56% annually and its population has increased by 4.7% since the most recent census, which recorded a population of 2,425 in 2020.