ZIP Code 56721 — East Grand Forks, MN
56721 is a standard (street delivery) ZIP code serving East Grand Forks, Minnesota, in Polk 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 56721 at a glance
| ZIP code | 56721 |
|---|---|
| Primary city | East Grand Forks |
| State | Minnesota (MN) |
| County | Polk FIPS 27119 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 10,679 |
| Coordinates | 47.971080, -96.943360 |
How ZIP+4 works in 56721
The four digits after the hyphen encode a delivery segment inside 56721. 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 56721 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 56721.
| ZIP | City | Distance |
|---|---|---|
| 58202 | Grand Forks, ND | 6.9 mi |
| 58203 | Grand Forks, ND | 9.7 mi |
| 58201 | Grand Forks, ND | 11.5 mi |
| 56723 | Fisher, MN | 13.1 mi |
| 56722 | Euclid, MN | 13.7 mi |
| 58256 | Manvel, ND | 14.4 mi |
| 58278 | Thompson, ND | 15.9 mi |
| 56762 | Warren, MN | 16.5 mi |
| 56710 | Alvarado, MN | 17.2 mi |
| 58258 | Mekinock, ND | 18.5 mi |
| 58228 | Emerado, ND | 19.6 mi |
| 56744 | Oslo, MN | 19.7 mi |
Questions about 56721
What is the ZIP+4 code for 56721?
56721 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 56721, you need to look up a specific street address to get them.
What city is 56721?
56721 is assigned to East Grand Forks, Minnesota, in Polk 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.