ZIP Code 58655 — South Heart, ND
58655 is a standard (street delivery) ZIP code serving South Heart, North Dakota, in Stark 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 58655 at a glance
| ZIP code | 58655 |
|---|---|
| Primary city | South Heart |
| State | North Dakota (ND) |
| County | Stark FIPS 38089 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 575 |
| Coordinates | 46.779210, -103.031630 |
How ZIP+4 works in 58655
The four digits after the hyphen encode a delivery segment inside 58655. 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 58655 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 58655.
| ZIP | City | Distance |
|---|---|---|
| 58622 | Belfield, ND | 12.2 mi |
| 58601 | Dickinson, ND | 13.2 mi |
| 58647 | New England, ND | 18.7 mi |
| 58630 | Gladstone, ND | 23.6 mi |
| 58620 | Amidon, ND | 24.7 mi |
| 58645 | Medora, ND | 26.6 mi |
| 58641 | Lefor, ND | 26.9 mi |
| 58656 | Taylor, ND | 29.2 mi |
| 58642 | Manning, ND | 30.6 mi |
| 58650 | Regent, ND | 31.7 mi |
| 58627 | Fairfield, ND | 33.9 mi |
Questions about 58655
What is the ZIP+4 code for 58655?
58655 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 58655, you need to look up a specific street address to get them.
What city is 58655?
58655 is assigned to South Heart, North Dakota, in Stark 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.