COUNTY · MD
Washington County, Maryland
Washington County is a county in Maryland with FIPS code 24043 and an estimated population of 155,813 (Census 2023), 11th largest of 24 in the state.
County facts
- Name
- Washington County
- State
- Maryland
- Type
- county
- FIPS code
- 24043
- State FIPS
- 24
- Population (2023)
- 155,813
- Change since 2020
- +0.7%
- State rank
- 11 of 24
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Washington County?
Washington County, Maryland has the five-digit FIPS code 24043: 24 for the state and 043 for the county.
What state is Washington County in?
Washington County is in Maryland.
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.