About 99338 - Kennewick, Washington
The ZIP code 99338 of Kennewick falls within Washington, the United States - a mid-sized area by population. It sits within Kennewick County County.
Census data puts the population of this ZIP code at 36,426 residents. That's noticeably above the average for a Washington ZIP code, which sits near 21,959 people.
Median household income is about $78,300 (near the Washington average).
Other ZIP code codes in Washington serve areas such as Tacoma, Milton, Seattle.