ZIP Codes
Benton County ZIP Codes help residents, businesses, and visitors identify mailing areas, organize addresses, and locate communities throughout the county. This guide provides a complete list of ZIP Codes in Benton County with the associated cities, making it easier to find the correct ZIP Code when sending mail, completing forms, or verifying location information.
Understanding ZIP Codes in Benton County
Benton County includes several communities with unique ZIP Codes used for mail delivery and address organization. ZIP Codes are assigned to specific delivery areas and may cover cities, neighborhoods, or surrounding rural areas. Using the correct ZIP Code helps ensure accurate mail processing and improves address accuracy for everyday services.
The county includes ZIP Codes serving communities such as Benton City, Kennewick, Paterson, Plymouth, Prosser, Richland, and West Richland. Some cities may have more than one ZIP Code because of population size, geographic coverage, or separate delivery areas.
Benton County ZIP Code List
| ZIP Code | City |
|---|---|
| 99320 | Benton City |
| 99336 | Kennewick |
| 99337 | Kennewick |
| 99338 | Kennewick |
| 99345 | Paterson |
| 99346 | Plymouth |
| 99350 | Prosser |
| 99352 | Richland |
| 99353 | Richland |
| 99353 | West Richland |
Finding the Right ZIP Code for an Address
When checking an address in Benton County, it is important to match the ZIP Code with the correct city and delivery area. A city may include multiple ZIP Codes, so relying only on the city name may not always provide the most accurate mailing information.
Residents can use this ZIP Code list as a quick reference when preparing documents, updating address information, confirming service areas, or identifying communities within Benton County.