Benton County, Washington ZIP codes
11 ZIP codes are in Benton County, plus 1 that cross in from neighboring counties. It's part of the Kennewick-Richland, WA metro area.
- ZIP codes
- 11
- Population in these ZIPs
- 234,788
- Avg. median income
- $88,500population-weighted
- Cities & towns
- 8
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Benton County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 98944 | Sunnyside | 22,817 | $64,276 | $319,100 |
| 99320 | Benton City | 9,879 | $90,102 | $434,700 |
| 99336 | Kennewick | 50,735 | $62,527 | $367,400 |
| 99337 | Kennewick | 33,287 | $98,848 | $429,600 |
| 99338 | Kennewick | 20,633 | $111,042 | $555,200 |
| 99345 | Paterson | 162 | $102,500 | $415,500 |
| 99346 | Plymouth | 198 | $50,865 | $209,200 |
| 99350 | Prosser | 14,837 | $81,014 | $415,900 |
| 99352 | Richland | 37,430 | $100,108 | $494,500 |
| 99353 | West Richland | 19,251 | $121,845 | $495,500 |
| 99354 | Richland | 25,559 | $91,933 | $415,400 |
ZIP codes partly in Benton County
These ZIP codes are mostly in a neighboring county but cover part of Benton County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 98930 | Grandview | Yakima County | 15,730 | $64,583 | $333,200 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Benton County
Nearby counties
Frequently asked questions
How many ZIP codes are in Benton County, Washington?
11 ZIP codes are mainly in Benton County, and 1 more ZIP codes from neighboring areas reach partly into it.
What cities are in Benton County?
ZIP codes in Benton County use the city names Benton City, Kennewick, Paterson, Plymouth, Prosser, Richland, Sunnyside and West Richland.
What metro area is Benton County in?
Benton County is part of the Kennewick-Richland, WA metropolitan statistical area.