COUNTY · KY
Spencer County, Kentucky
Spencer County is a county in Kentucky with FIPS code 21215 and an estimated population of 20,531 (Census 2023), 55th largest of 120 in the state.
County facts
- Name
- Spencer County
- State
- Kentucky
- Type
- county
- FIPS code
- 21215
- State FIPS
- 21
- Population (2023)
- 20,531
- Change since 2020
- +5.2%
- State rank
- 55 of 120
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Spencer County?
Spencer County, Kentucky has the five-digit FIPS code 21215: 21 for the state and 215 for the county.
What state is Spencer County in?
Spencer County is in Kentucky.
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.