ZIP Code 59830 — De Borgia, MT
59830 is a standard (street delivery) ZIP code serving De Borgia, Montana, in Mineral 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 59830 at a glance
| ZIP code | 59830 |
|---|---|
| Primary city | De Borgia |
| State | Montana (MT) |
| County | Mineral FIPS 30061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 102 |
| Coordinates | 47.434190, -115.458960 |
How ZIP+4 works in 59830
The four digits after the hyphen encode a delivery segment inside 59830. 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 59830 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 59830.
| ZIP | City | Distance |
|---|---|---|
| 59867 | Saltese, MT | 4.8 mi |
| 59842 | Haugan, MT | 8 mi |
| 83846 | Mullan, ID | 13.9 mi |
| 83802 | Avery, ID | 17.1 mi |
| 59866 | Saint Regis, MT | 17.5 mi |
| 59873 | Thompson Falls, MT | 20.1 mi |
| 83874 | Murray, ID | 20.7 mi |
| 83867 | Silverton, ID | 23.3 mi |
| 83873 | Wallace, ID | 23.9 mi |
| 83849 | Osburn, ID | 25.7 mi |
| 59874 | Trout Creek, MT | 26.6 mi |
| 59872 | Superior, MT | 34.6 mi |
Questions about 59830
What is the ZIP+4 code for 59830?
59830 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 59830, you need to look up a specific street address to get them.
What city is 59830?
59830 is assigned to De Borgia, Montana, in Mineral 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.