COUNTY · SD
Brown County, South Dakota
Brown County is a county in South Dakota with FIPS code 46013 and an estimated population of 37,733 (Census 2023), 4th largest of 66 in the state.
County facts
- Name
- Brown County
- State
- South Dakota
- Type
- county
- FIPS code
- 46013
- State FIPS
- 46
- Population (2023)
- 37,733
- Change since 2020
- -1.3%
- State rank
- 4 of 66
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Brown County?
Brown County, South Dakota has the five-digit FIPS code 46013: 46 for the state and 013 for the county.
What state is Brown County in?
Brown County is in South Dakota.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.