ZIP Code 98370 — Poulsbo, WA
98370 is a standard (street delivery) ZIP code serving Poulsbo, Washington, in Kitsap 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 98370 at a glance
| ZIP code | 98370 |
|---|---|
| Primary city | Poulsbo |
| State | Washington (WA) |
| County | Kitsap FIPS 53035 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 33,655 |
| Coordinates | 47.751140, -122.623730 |
How ZIP+4 works in 98370
The four digits after the hyphen encode a delivery segment inside 98370. 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 98370 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 98370.
| ZIP | City | Distance |
|---|---|---|
| 98392 | Suquamish, WA | 3 mi |
| 98345 | Keyport, WA | 3.5 mi |
| 98315 | Silverdale, WA | 4.6 mi |
| 98342 | Indianola, WA | 4.8 mi |
| 98346 | Kingston, WA | 6.3 mi |
| 98364 | Port Gamble, WA | 7.3 mi |
| 98383 | Silverdale, WA | 7.5 mi |
| 98110 | Bainbridge Island, WA | 8.3 mi |
| 98311 | Bremerton, WA | 8.5 mi |
| 98365 | Port Ludlow, WA | 10.6 mi |
| 98340 | Hansville, WA | 11.1 mi |
| 98310 | Bremerton, WA | 11.2 mi |
Questions about 98370
What is the ZIP+4 code for 98370?
98370 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 98370, you need to look up a specific street address to get them.
What city is 98370?
98370 is assigned to Poulsbo, Washington, in Kitsap 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.