ZIP Code 98851 — Soap Lake, WA
98851 is a standard (street delivery) ZIP code serving Soap Lake, 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 98851 at a glance
| ZIP code | 98851 |
|---|---|
| Primary city | Soap Lake |
| State | Washington (WA) |
| County | Grant FIPS 53025 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 4,437 |
| Coordinates | 47.420020, -119.434620 |
How ZIP+4 works in 98851
The four digits after the hyphen encode a delivery segment inside 98851. 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 98851 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 98851.
| ZIP | City | Distance |
|---|---|---|
| 98853 | Stratford, WA | 7.4 mi |
| 98823 | Ephrata, WA | 10.9 mi |
| 98860 | Wilson Creek, WA | 14.9 mi |
| 99115 | Coulee City, WA | 17.6 mi |
| 98837 | Moses Lake, WA | 19.6 mi |
| 98832 | Marlin, WA | 20 mi |
| 98845 | Palisades, WA | 22.2 mi |
| 99135 | Hartline, WA | 22.7 mi |
| 98848 | Quincy, WA | 25.6 mi |
| 98858 | Waterville, WA | 27.4 mi |
| 98850 | Rock Island, WA | 28 mi |
| 98824 | George, WA | 31.5 mi |
Questions about 98851
What is the ZIP+4 code for 98851?
98851 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 98851, you need to look up a specific street address to get them.
What city is 98851?
98851 is assigned to Soap Lake, 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.