Multnomah County
Also known as Multnomah County, Oregon, Multnomah County, OR
county in Oregon, United States
Key facts
- Country
- United States
- State
- Oregon
- Founded
- December 22, 1854
- Named after
- Multnomah people
- Seat
- Portland
- Largest city
- Portland
- Total
- 466 sq mi (1,210 km )
- Land
- 431 sq mi (1,120 km )
- Water
- 34 sq mi (88 km ) 7.4%
- Estimate 2025
- 795,391
- Density
- 1,890/sq mi (730/km )
- Time zone
- UTC−8 ( Pacific )
- Summer dst
- UTC−7 ( PDT )
Article
Multnomah County /mʌltˈnoʊmə/ is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the county's population was 815,428. Multnomah County is part of the Portland metropolitan area. It is the state's smallest and most populous county, and its county seat, Portland, is the state's most populous city.
Map of Multnomah County