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Clark County Washington Last Updated: 08/11/2026 |
| Clark County is the southernmost county in the state of Washington, United States. Its population in 2020 was 503,311. The county seat and largest city is Vancouver. Situated along the majestic Columbia River with the magnificent Cascade Mountains as a backdrop, Clark County offers a blend of urban areas, historical landmarks, and forests that everyone can enjoy. | |
| The county boasts numerous urban and rural parks, as well as natural areas for outdoor activities. | |