ZIP Code 99349 — Mattawa, WA
99349 is a standard (street delivery) ZIP code serving Mattawa, Washington, in Grant County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 99349 at a glance
| ZIP code | 99349 |
|---|---|
| Primary city | Mattawa |
| State | Washington (WA) |
| County | Grant FIPS 53025 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 8,143 |
| Coordinates | 46.730780, -119.699600 |
How ZIP+4 works in 99349
The four digits after the hyphen encode a delivery segment inside 99349. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 99349 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 99349.
| ZIP | City | Distance |
|---|---|---|
| 99357 | Royal City, WA | 11.2 mi |
| 99321 | Beverly, WA | 12.9 mi |
| 98950 | Vantage, WA | 15.8 mi |
| 98944 | Sunnyside, WA | 16 mi |
| 98824 | George, WA | 24.6 mi |
| 98936 | Moxee, WA | 25.3 mi |
| 99344 | Othello, WA | 25.7 mi |
| 99343 | Mesa, WA | 26.8 mi |
| 99320 | Benton City, WA | 29.1 mi |
| 98938 | Outlook, WA | 30.2 mi |
| 98848 | Quincy, WA | 31.2 mi |
| 98953 | Zillah, WA | 32.2 mi |
Questions about 99349
What is the ZIP+4 code for 99349?
99349 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 99349, you need to look up a specific street address to get them.
What city is 99349?
99349 is assigned to Mattawa, Washington, in Grant County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.