ZIP Code 58566 — Saint Anthony, ND
58566 is a standard (street delivery) ZIP code serving Saint Anthony, North Dakota, in Morton 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 58566 at a glance
| ZIP code | 58566 |
|---|---|
| Primary city | Saint Anthony |
| State | North Dakota (ND) |
| County | Morton FIPS 38059 |
| ZIP type | Standard (street delivery) |
| Time zone | America/North_Dakota/New_Salem |
| Population | 272 |
| Coordinates | 46.578350, -100.906730 |
How ZIP+4 works in 58566
The four digits after the hyphen encode a delivery segment inside 58566. 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 58566 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 58566.
| ZIP | City | Distance |
|---|---|---|
| 58554 | Mandan, ND | 12.1 mi |
| 58570 | Solen, ND | 14.3 mi |
| 58504 | Bismarck, ND | 14.8 mi |
| 58535 | Flasher, ND | 17.3 mi |
| 58505 | Bismarck, ND | 17.7 mi |
| 58501 | Bismarck, ND | 19.2 mi |
| 58528 | Cannon Ball, ND | 21 mi |
| 58503 | Bismarck, ND | 23.8 mi |
| 58558 | Menoken, ND | 24.8 mi |
| 58569 | Shields, ND | 25.9 mi |
| 58544 | Hazelton, ND | 26 mi |
| 58560 | Moffit, ND | 28.1 mi |
Questions about 58566
What is the ZIP+4 code for 58566?
58566 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 58566, you need to look up a specific street address to get them.
What city is 58566?
58566 is assigned to Saint Anthony, North Dakota, in Morton 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.