ZIP Code 56540 — Fertile, MN
56540 is a standard (street delivery) ZIP code serving Fertile, 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 56540 at a glance
| ZIP code | 56540 |
|---|---|
| Primary city | Fertile |
| State | Minnesota (MN) |
| County | Polk FIPS 27119 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,891 |
| Coordinates | 47.542550, -96.276710 |
How ZIP+4 works in 56540
The four digits after the hyphen encode a delivery segment inside 56540. 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 56540 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 56540.
| ZIP | City | Distance |
|---|---|---|
| 56545 | Gary, MN | 11 mi |
| 56736 | Mentor, MN | 12.2 mi |
| 56517 | Beltrami, MN | 12.2 mi |
| 56592 | Winger, MN | 12.5 mi |
| 56535 | Erskine, MN | 14.1 mi |
| 56516 | Bejou, MN | 16 mi |
| 56510 | Ada, MN | 17.1 mi |
| 56716 | Crookston, MN | 18.9 mi |
| 56556 | Mcintosh, MN | 20.1 mi |
| 56584 | Twin Valley, MN | 21.6 mi |
| 56581 | Shelly, MN | 23.3 mi |
| 56568 | Nielsville, MN | 23.4 mi |
Questions about 56540
What is the ZIP+4 code for 56540?
56540 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 56540, you need to look up a specific street address to get them.
What city is 56540?
56540 is assigned to Fertile, 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.