Wahkiakum County

Founded: April 25, 1854

Wahkiakum County Sheriff's Office 64 Main Street Cathlamet, WA 98612 Phone: 360.795.3242 Web Site Send Email

Wahkiakum County is named after Chief Wahkiakum ("Tall Timber") of the Chinook. It is the smallest county (by total area) in the state, and has the third-smallest land area (behind San Juan County and Island County). As of 2017, the estimated population was 4,264. The county seat is the town of Cathlamet, which is also the county's largest and only incorporated community. The County operates the Wahkiakum County Ferry, which connects Cathlamet to Westport, Oregon across the Columbia River.

Wahkiakum County was formed out of Cowlitz County on April 25, 1854.

According to the U.S. Census Bureau, the county has a total area of 287 square miles, of which, 264 square miles of it is land and 22 square miles of it (7.83%) is water. The population density is 16 per square mile.

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