ZIP Code 98031 — Kent, WA
98031 is a standard (street delivery) ZIP code serving Kent, Washington, in King 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 98031 at a glance
| ZIP code | 98031 |
|---|---|
| Primary city | Kent |
| State | Washington (WA) |
| County | King FIPS 53033 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 40,094 |
| Coordinates | 47.405500, -122.194300 |
How ZIP+4 works in 98031
The four digits after the hyphen encode a delivery segment inside 98031. 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 98031 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.
Other ZIP codes in Kent
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 98031.
| ZIP | City | Distance |
|---|---|---|
| 98030 | Kent, WA | 2.6 mi |
| 98055 | Renton, WA | 2.9 mi |
| 98032 | Kent, WA | 3.1 mi |
| 98058 | Renton, WA | 4.1 mi |
| 98042 | Kent, WA | 4.6 mi |
| 98057 | Renton, WA | 4.7 mi |
| 98188 | Seattle, WA | 4.7 mi |
| 98198 | Seattle, WA | 5.5 mi |
| 98158 | Seattle, WA | 6.2 mi |
| 98148 | Seattle, WA | 6.7 mi |
| 98002 | Auburn, WA | 6.8 mi |
| 98178 | Seattle, WA | 6.9 mi |
Questions about 98031
What is the ZIP+4 code for 98031?
98031 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 98031, you need to look up a specific street address to get them.
What city is 98031?
98031 is assigned to Kent, Washington, in King 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.