ZIP Code 98256 — Index, WA
98256 is a standard (street delivery) ZIP code serving Index, Washington, in Snohomish 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 98256 at a glance
| ZIP code | 98256 |
|---|---|
| Primary city | Index |
| State | Washington (WA) |
| County | Snohomish FIPS 53061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 368 |
| Coordinates | 47.828830, -121.414640 |
How ZIP+4 works in 98256
The four digits after the hyphen encode a delivery segment inside 98256. 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 98256 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 98256.
| ZIP | City | Distance |
|---|---|---|
| 98251 | Gold Bar, WA | 8.2 mi |
| 98224 | Baring, WA | 9.6 mi |
| 98288 | Skykomish, WA | 12.5 mi |
| 98294 | Sultan, WA | 16 mi |
| 98252 | Granite Falls, WA | 21.1 mi |
| 98014 | Carnation, WA | 21.7 mi |
| 98272 | Monroe, WA | 21.9 mi |
| 98065 | Snoqualmie, WA | 23.8 mi |
| 98019 | Duvall, WA | 24.9 mi |
| 98826 | Leavenworth, WA | 26.1 mi |
| 98068 | Snoqualmie Pass, WA | 26.2 mi |
| 98045 | North Bend, WA | 26.4 mi |
Questions about 98256
What is the ZIP+4 code for 98256?
98256 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 98256, you need to look up a specific street address to get them.
What city is 98256?
98256 is assigned to Index, Washington, in Snohomish 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.