ZIP Code 04631 — Eastport, ME
04631 is a standard (street delivery) ZIP code serving Eastport, Maine, in Washington 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 04631 at a glance
| ZIP code | 04631 |
|---|---|
| Primary city | Eastport |
| State | Maine (ME) |
| County | Washington FIPS 23029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,263 |
| Coordinates | 44.913730, -67.018340 |
How ZIP+4 works in 04631
The four digits after the hyphen encode a delivery segment inside 04631. 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 04631 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 04631.
| ZIP | City | Distance |
|---|---|---|
| 04667 | Perry, ME | 6.1 mi |
| 04652 | Lubec, ME | 6.9 mi |
| 04666 | Pembroke, ME | 10.9 mi |
| 04671 | Robbinston, ME | 12.7 mi |
| 04628 | Dennysville, ME | 13.2 mi |
| 04691 | Whiting, ME | 15.5 mi |
| 04619 | Calais, ME | 18.2 mi |
| 04626 | Cutler, ME | 18.7 mi |
| 04657 | Meddybemps, ME | 20.1 mi |
| 04630 | East Machias, ME | 22.7 mi |
| 04655 | Machiasport, ME | 25.1 mi |
| 04694 | Baileyville, ME | 25.3 mi |
Questions about 04631
What is the ZIP+4 code for 04631?
04631 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 04631, you need to look up a specific street address to get them.
What city is 04631?
04631 is assigned to Eastport, Maine, in Washington 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.