ZIP Code 58643 — Marmarth, ND
58643 is a standard (street delivery) ZIP code serving Marmarth, North Dakota, in Bowman 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 58643 at a glance
| ZIP code | 58643 |
|---|---|
| Primary city | Marmarth |
| State | North Dakota (ND) |
| County | Bowman FIPS 38011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 119 |
| Coordinates | 46.229740, -103.950910 |
How ZIP+4 works in 58643
The four digits after the hyphen encode a delivery segment inside 58643. 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 58643 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 58643.
| ZIP | City | Distance |
|---|---|---|
| 58651 | Rhame, ND | 10.2 mi |
| 59313 | Baker, MT | 14.6 mi |
| 59354 | Willard, MT | 22.5 mi |
| 58623 | Bowman, ND | 25.7 mi |
| 58632 | Golva, ND | 31.3 mi |
| 58620 | Amidon, ND | 33.9 mi |
| 57755 | Ludlow, SD | 39.2 mi |
Questions about 58643
What is the ZIP+4 code for 58643?
58643 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 58643, you need to look up a specific street address to get them.
What city is 58643?
58643 is assigned to Marmarth, North Dakota, in Bowman 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.