ZIP Code 59858 — Philipsburg, MT
59858 is a standard (street delivery) ZIP code serving Philipsburg, Montana, in Granite 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 59858 at a glance
| ZIP code | 59858 |
|---|---|
| Primary city | Philipsburg |
| State | Montana (MT) |
| County | Granite FIPS 30039 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 1,494 |
| Coordinates | 46.295840, -113.483710 |
How ZIP+4 works in 59858
The four digits after the hyphen encode a delivery segment inside 59858. 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 59858 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 59858.
| ZIP | City | Distance |
|---|---|---|
| 59837 | Hall, MT | 19.5 mi |
| 59711 | Anaconda, MT | 22.7 mi |
| 59828 | Corvallis, MT | 23.1 mi |
| 59825 | Clinton, MT | 26.6 mi |
| 59832 | Drummond, MT | 29.1 mi |
| 59733 | Gold Creek, MT | 30.9 mi |
| 59870 | Stevensville, MT | 31.5 mi |
| 59871 | Sula, MT | 31.7 mi |
| 59762 | Wise River, MT | 36.3 mi |
| 59833 | Florence, MT | 37.1 mi |
| 59827 | Conner, MT | 40.2 mi |
| 59803 | Missoula, MT | 40.2 mi |
Questions about 59858
What is the ZIP+4 code for 59858?
59858 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 59858, you need to look up a specific street address to get them.
What city is 59858?
59858 is assigned to Philipsburg, Montana, in Granite 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.