La Valley township
- County:
- Lincoln County
- County Seat:
- No
- Area (mi²):
- 34.546
- State:
- South Dakota
La Valley township is located in Lincoln County, South Dakota. La Valley township has a 2025 population of 657. La Valley township is currently declining at a rate of -1.05% annually and its population has decreased by -1.5% since the most recent census, which recorded a population of 667 in 2020.
The average household income in La Valley township is $266,959 with a poverty rate of 5.67%. The median age in La Valley township is 49.7 years: 59.1 years for males, and 40.9 years for females.