
Lyon township
- County:
- Brule County
- County Seat:
- No
- Area (mi²):
- 35.48
- State:
- South Dakota
Lyon township is located in Brule County, South Dakota. Lyon township has a 2025 population of 27. Lyon township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 27 in 2020.
The average household income in Lyon township is $87,300 with a poverty rate of 40%. The median age in Lyon township is 76.6 years: 76.5 years for males, and 76.7 years for females.