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Clark County, Washington

US county information
NameClark County
US Area
Total Area656 sq mi (1699 km2)
Land Area628 sq mi (1626.5 km2)
Water Area28 sq mi (72.5 km2)
Population425363 (2010)
Density261.4/km2 (677/sq mi)
FoundedAugust 20, 1845

     Home | County | Clark County Washington

Clark County is a county located in the southwestern part of the U.S. state of Washington, across the Columbia River from Portland, Oregon.

Clark County was the first county of Washington, named after William Clark of the Lewis and Clark Expedition. It was created by the provisional government of Oregon Territory on August 20, 1845, and at that time covered the entire present-day state.

On April 1, 2010 Census, Clark County's population was to be 425,363. Its county seat is at Vancouver, which is also its largest city.

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