ZIP Code 56737 — Middle River, MN
56737 is a standard (street delivery) ZIP code serving Middle River, Minnesota, in Marshall 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 56737 at a glance
| ZIP code | 56737 |
|---|---|
| Primary city | Middle River |
| State | Minnesota (MN) |
| County | Marshall FIPS 27089 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 811 |
| Coordinates | 48.411440, -96.010810 |
How ZIP+4 works in 56737
The four digits after the hyphen encode a delivery segment inside 56737. 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 56737 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 56737.
| ZIP | City | Distance |
|---|---|---|
| 56759 | Strathcona, MN | 10.2 mi |
| 56724 | Gatzke, MN | 12.9 mi |
| 56738 | Newfolden, MN | 15.5 mi |
| 56761 | Wannaska, MN | 19.8 mi |
| 56701 | Thief River Falls, MN | 21.9 mi |
| 56725 | Goodridge, MN | 23 mi |
| 56760 | Viking, MN | 23.2 mi |
| 56758 | Strandquist, MN | 23.5 mi |
| 56726 | Greenbush, MN | 23.8 mi |
| 56732 | Karlstad, MN | 25.2 mi |
| 56714 | Badger, MN | 26 mi |
| 56751 | Roseau, MN | 29.8 mi |
Questions about 56737
What is the ZIP+4 code for 56737?
56737 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 56737, you need to look up a specific street address to get them.
What city is 56737?
56737 is assigned to Middle River, Minnesota, in Marshall 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.