Multnomah County Flag

Multnomah County

State:
Oregon
County Seat:
Portland

Multnomah County's estimated 2025 population is 779,968 with a growth rate of -0.62% in the past year according to the most recent United States census data. Multnomah County is the 1st largest county in Oregon. The 2010 population was 737,320 and has seen a growth of 5.78% since that time.

779,968
Total Population
1,810
Population Density (mi²)
1
Population Rank (State)
-4.9K -0.62%
Annual Population Growth

Multnomah County Population

Demographics

Economics and Income Statistics