ZIP Code 59003 — Ashland, MT
59003 is a standard (street delivery) ZIP code serving Ashland, Montana, in Powder River 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 59003 at a glance
| ZIP code | 59003 |
|---|---|
| Primary city | Ashland |
| State | Montana (MT) |
| County | Powder River FIPS 30075 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 1,334 |
| Coordinates | 45.481790, -106.201530 |
How ZIP+4 works in 59003
The four digits after the hyphen encode a delivery segment inside 59003. 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 59003 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 59003.
| ZIP | City | Distance |
|---|---|---|
| 59043 | Lame Deer, MT | 22.3 mi |
| 59062 | Otter, MT | 22.4 mi |
| 59012 | Birney, MT | 23.1 mi |
| 59351 | Volborg, MT | 30.8 mi |
| 59025 | Decker, MT | 36.6 mi |
| 59323 | Colstrip, MT | 38.4 mi |
Questions about 59003
What is the ZIP+4 code for 59003?
59003 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 59003, you need to look up a specific street address to get them.
What city is 59003?
59003 is assigned to Ashland, Montana, in Powder River 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.