Multnomah County, Oregon

Multnomah County, Oregon
Multnomah County, Oregon
County
	Downtown Portland Crown Point and the Columbia River Gorge Bonneville Dam Old Multnomah County Courthouse
	Seal Logo
	Location within the U.S. state of Oregon
	Coordinates: 45°32′N 122°25′W / 45.54°N 122.41°W
Country	United States
State	Oregon
Founded	December 22, 1854
Named for	Multnomah people
Seat	Portland
Largest city	Portland
Area
• Total	466 sq mi (1,210 km2)
• Land	431 sq mi (1,120 km2)
• Water	34 sq mi (88 km2) 7.4%
Population (2020)
• Total	815,428
• Estimate (2025)	795,391
• Density	1,890/sq mi (730/km2)
Time zone	UTC−8 (Pacific)
• Summer (DST)	UTC−7 (PDT)
Congressional districts	1st, 3rd, 5th
Website	www.multco.us

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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.