COUNTY · KY
Martin County, Kentucky
Martin County is a county in Kentucky with FIPS code 21159 and an estimated population of 10,928 (Census 2023), 97th largest of 120 in the state.
County facts
- Name
- Martin County
- State
- Kentucky
- Type
- county
- FIPS code
- 21159
- State FIPS
- 21
- Population (2023)
- 10,928
- Change since 2020
- -2.9%
- State rank
- 97 of 120
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Martin County?
Martin County, Kentucky has the five-digit FIPS code 21159: 21 for the state and 159 for the county.
What state is Martin County in?
Martin 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.