About 98626 - Kelso, Washington

Located in Washington, the United States is home to the mid-sized community of Kelso, served by ZIP code 98626. It sits within Cowlitz County.

Census data puts the population of this ZIP code at 26,892 residents. That's noticeably above the average for a Washington ZIP code, which sits near 13,092 people.

Population density runs around 77 people per sq. mile, making it a rural area.

This ZIP code sits alongside neighboring areas like Pasco, Redmond, Bothell within Washington.