Multnomah County is the smallest Oregon county geographically and yet it contains approximately 20% of the state's population due to the high density found in Portland and the surrounding cities.

About
Established: Dec. 22, 1854
Elev. at Portland: 77'
Area: 465 sq. mi.
Average Temp.: January 38.9°, July 67.7°
Assessed Value: $49,186,156,469
Real Market Value: $97,120,992,685
Annual Precipitation: 37.39"
Economy: Manufacturing, transportation, wholesale and retail trade, and tourism.