COUNTY · SD
Pennington County, South Dakota
Pennington County is a county in South Dakota with FIPS code 46103 and an estimated population of 115,903 (Census 2023), 2nd largest of 66 in the state.
County facts
- Name
- Pennington County
- State
- South Dakota
- Type
- county
- FIPS code
- 46103
- State FIPS
- 46
- Population (2023)
- 115,903
- Change since 2020
- +5.8%
- State rank
- 2 of 66
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Pennington County
Other counties in South Dakota
Questions
What is the FIPS code for Pennington County?
Pennington County, South Dakota has the five-digit FIPS code 46103: 46 for the state and 103 for the county.
What state is Pennington County in?
Pennington 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.