ZIP Code 04257 — Mexico, ME
04257 is a standard (street delivery) ZIP code serving Mexico, Maine, in Oxford 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 04257 at a glance
| ZIP code | 04257 |
|---|---|
| Primary city | Mexico |
| State | Maine (ME) |
| County | Oxford FIPS 23017 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,782 |
| Coordinates | 44.573470, -70.513580 |
How ZIP+4 works in 04257
The four digits after the hyphen encode a delivery segment inside 04257. 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 04257 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 04257.
| ZIP | City | Distance |
|---|---|---|
| 04224 | Dixfield, ME | 5.6 mi |
| 04276 | Rumford, ME | 5.7 mi |
| 04290 | Peru, ME | 7.6 mi |
| 04285 | Weld, ME | 9.6 mi |
| 04275 | Roxbury, ME | 10.1 mi |
| 04226 | East Andover, ME | 10.2 mi |
| 04227 | East Dixfield, ME | 10.8 mi |
| 04237 | Hanover, ME | 11.7 mi |
| 04219 | Bryant Pond, ME | 12 mi |
| 04294 | Wilton, ME | 12.4 mi |
| 04221 | Canton, ME | 12.7 mi |
| 04292 | Sumner, ME | 14.1 mi |
Questions about 04257
What is the ZIP+4 code for 04257?
04257 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 04257, you need to look up a specific street address to get them.
What city is 04257?
04257 is assigned to Mexico, Maine, in Oxford 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.