Kennewick, Washington ZIP Codes
- ZIP records
3 - Sum of listed ZIP population estimates
104,655 - Counties represented
1 - Population range
20,633–50,735 per ZIP
Population sum includes positive estimates in these ZIP records; it is not an official city population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | County | Population estimate |
|---|---|---|---|---|
| 1 | 99336 | Kennewick | Benton | 50,735 |
| 2 | 99337 | Kennewick | Benton | 33,287 |
| 3 | 99338 | Kennewick | Benton | 20,633 |
Counties represented
All ZIP Codes in Kennewick
Browse all ZIP data for Washington
Methodology: ZIP records are grouped by the source file's primary city and state fields. Population ranges and sums use positive ZIP-level estimates; sums should not be read as official city totals. County links use each record's listed county assignment.