ZIP Code 56557 — Mahnomen, MN
56557 is a standard (street delivery) ZIP code serving Mahnomen, Minnesota, in Mahnomen 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 56557 at a glance
| ZIP code | 56557 |
|---|---|
| Primary city | Mahnomen |
| State | Minnesota (MN) |
| County | Mahnomen FIPS 27087 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,758 |
| Coordinates | 47.324220, -95.837000 |
How ZIP+4 works in 56557
The four digits after the hyphen encode a delivery segment inside 56557. 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 56557 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 56557.
| ZIP | City | Distance |
|---|---|---|
| 56516 | Bejou, MN | 10.2 mi |
| 56589 | Waubun, MN | 11.4 mi |
| 56566 | Naytahwaush, MN | 11.7 mi |
| 56651 | Lengby, MN | 13 mi |
| 56591 | White Earth, MN | 15.5 mi |
| 56592 | Winger, MN | 16.6 mi |
| 56569 | Ogema, MN | 17.2 mi |
| 56541 | Flom, MN | 17.5 mi |
| 56542 | Fosston, MN | 17.6 mi |
| 56545 | Gary, MN | 19.3 mi |
| 56584 | Twin Valley, MN | 19.7 mi |
| 56621 | Bagley, MN | 20.6 mi |
Questions about 56557
What is the ZIP+4 code for 56557?
56557 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 56557, you need to look up a specific street address to get them.
What city is 56557?
56557 is assigned to Mahnomen, Minnesota, in Mahnomen 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.