ZIP Code 98043 — Mountlake Terrace, WA
98043 is a standard (street delivery) ZIP code serving Mountlake Terrace, 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 98043 at a glance
| ZIP code | 98043 |
|---|---|
| Primary city | Mountlake Terrace |
| State | Washington (WA) |
| County | Snohomish FIPS 53061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 23,101 |
| Coordinates | 47.792100, -122.307580 |
How ZIP+4 works in 98043
The four digits after the hyphen encode a delivery segment inside 98043. 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 98043 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 98043.
| ZIP | City | Distance |
|---|---|---|
| 98036 | Lynnwood, WA | 1.8 mi |
| 98155 | Seattle, WA | 2.5 mi |
| 98020 | Edmonds, WA | 3.1 mi |
| 98026 | Edmonds, WA | 3.2 mi |
| 98037 | Lynnwood, WA | 3.4 mi |
| 98028 | Kenmore, WA | 3.9 mi |
| 98133 | Seattle, WA | 4 mi |
| 98177 | Seattle, WA | 4.5 mi |
| 98021 | Bothell, WA | 4.6 mi |
| 98087 | Lynnwood, WA | 5.2 mi |
| 98125 | Seattle, WA | 5.2 mi |
| 98011 | Bothell, WA | 5.6 mi |
Questions about 98043
What is the ZIP+4 code for 98043?
98043 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 98043, you need to look up a specific street address to get them.
What city is 98043?
98043 is assigned to Mountlake Terrace, 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.