ZIP Code 59072 — Roundup, MT
59072 is a standard (street delivery) ZIP code serving Roundup, Montana, in Musselshell 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 59072 at a glance
| ZIP code | 59072 |
|---|---|
| Primary city | Roundup |
| State | Montana (MT) |
| County | Musselshell FIPS 30065 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 4,690 |
| Coordinates | 46.518390, -108.549690 |
How ZIP+4 works in 59072
The four digits after the hyphen encode a delivery segment inside 59072. 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 59072 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 59072.
| ZIP | City | Distance |
|---|---|---|
| 59059 | Musselshell, MT | 21.9 mi |
| 59046 | Lavina, MT | 22.5 mi |
| 59441 | Forest Grove, MT | 31.1 mi |
| 59079 | Shepherd, MT | 32.7 mi |
| 59015 | Broadview, MT | 32.8 mi |
| 59032 | Grass Range, MT | 35.4 mi |
| 59088 | Worden, MT | 36.4 mi |
Questions about 59072
What is the ZIP+4 code for 59072?
59072 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 59072, you need to look up a specific street address to get them.
What city is 59072?
59072 is assigned to Roundup, Montana, in Musselshell 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.