
Warner
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 0.279
- State:
- South Dakota
Warner is a town located in Brown County, South Dakota. Warner has a 2025 population of 450. Warner is currently declining at a rate of -1.32% annually and its population has decreased by -6.64% since the most recent census, which recorded a population of 482 in 2020.
The average household income in Warner is $122,046 with a poverty rate of 0.4%. The median age in Warner is 34.3 years: 30.2 years for males, and 35.7 years for females.