COUNTY · OR
Marion County, Oregon
Marion County is a county in Oregon with FIPS code 41047 and an estimated population of 346,741 (Census 2023), 5th largest of 36 in the state.
County facts
- Name
- Marion County
- State
- Oregon
- Type
- county
- FIPS code
- 41047
- State FIPS
- 41
- Population (2023)
- 346,741
- Change since 2020
- +0.1%
- State rank
- 5 of 36
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Marion County
Other counties in Oregon
Questions
What is the FIPS code for Marion County?
Marion County, Oregon has the five-digit FIPS code 41047: 41 for the state and 047 for the county.
What state is Marion County in?
Marion County is in Oregon.
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.