ZIP Code 98133 — Seattle, WA
98133 is a standard (street delivery) ZIP code serving Seattle, 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 98133 at a glance
| ZIP code | 98133 |
|---|---|
| Primary city | Seattle |
| State | Washington (WA) |
| County | King FIPS 53033 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 53,249 |
| Coordinates | 47.739900, -122.344320 |
How ZIP+4 works in 98133
The four digits after the hyphen encode a delivery segment inside 98133. 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 98133 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 Seattle
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 98133.
| ZIP | City | Distance |
|---|---|---|
| 98177 | Seattle, WA | 1.2 mi |
| 98155 | Seattle, WA | 2.3 mi |
| 98125 | Seattle, WA | 2.6 mi |
| 98117 | Seattle, WA | 4 mi |
| 98043 | Mountlake Terrace, WA | 4 mi |
| 98020 | Edmonds, WA | 4.4 mi |
| 98028 | Kenmore, WA | 4.5 mi |
| 98103 | Seattle, WA | 4.6 mi |
| 98115 | Seattle, WA | 4.7 mi |
| 98107 | Seattle, WA | 5.2 mi |
| 98036 | Lynnwood, WA | 5.7 mi |
| 98195 | Seattle, WA | 6.1 mi |
Questions about 98133
What is the ZIP+4 code for 98133?
98133 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 98133, you need to look up a specific street address to get them.
What city is 98133?
98133 is assigned to Seattle, 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.