Pasco, WA ZIP Codes
Pasco, Washington has 2 ZIP codes: for street addresses and for PO boxes.
Mail addressed to Pasco covers nearby places too.
Where the 99301 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
99302 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Pasco city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Pasco
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Pasco PO box and business ZIP codes
| ZIP | Type and post office or station |
|---|---|
| 99301 | street delivery Downtown Pasco |
| 99302 | PO boxes at the Pasco Sorting and Delivery Center post office Pasco Sorting and Delivery Center |
Why your mail may say Pasco when you live outside it
Pasco ZIP codes also cover West Pasco, so a letter addressed to Pasco can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Franklin County property records show which city you are in.
Pasco ZIP code questions
What is the main ZIP code for Pasco?
99301, the ZIP code of the main Downtown Pasco post office at 403 W Lewis St.
Which Pasco ZIP codes are for PO boxes only?
99302. Mail to it goes to boxes at the post office, not to street addresses.
What county is Pasco in?
Franklin County.
ZIP codes for towns near Pasco
More towns near Pasco: Lewiston, Spokane, Spokane Valley, Post Falls, Coeur d'Alene, Graham, South Hill, Auburn, Puyallup.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections