Columbia County Washington is covered by a total of 6 ZIP Codes. There are 4 ZIP Codes in Columbia County that extend into adjacent counties (Garfield County, Walla Walla County, and Whitman County). Of the ZIP codes within or partially within Columbia County there are 4 Standard ZIP Codes and 1 PO Box ZIP Codes.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Columbia County and can be turned on and off. Each type of postal code can also be turned on and off.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Lacrosse | Standard | |||
| Dayton | Standard | |||
| Pomeroy | Standard | |||
| Prescott | Standard | |||
| Starbuck | PO Box | |||
| Waitsburg | Standard |