ZIP Code 59457 — Lewistown, MT
59457 is a standard (street delivery) ZIP code serving Lewistown, Montana, in Fergus 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 59457 at a glance
| ZIP code | 59457 |
|---|---|
| Primary city | Lewistown |
| State | Montana (MT) |
| County | Fergus FIPS 30027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 9,135 |
| Coordinates | 47.080270, -109.386560 |
How ZIP+4 works in 59457
The four digits after the hyphen encode a delivery segment inside 59457. 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 59457 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 59457.
| ZIP | City | Distance |
|---|---|---|
| 59464 | Moore, MT | 17.6 mi |
| 59451 | Hilger, MT | 21.4 mi |
| 59462 | Moccasin, MT | 23.5 mi |
| 59441 | Forest Grove, MT | 24.4 mi |
| 59418 | Buffalo, MT | 30 mi |
| 59453 | Judith Gap, MT | 32 mi |
| 59430 | Denton, MT | 32.1 mi |
Questions about 59457
What is the ZIP+4 code for 59457?
59457 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 59457, you need to look up a specific street address to get them.
What city is 59457?
59457 is assigned to Lewistown, Montana, in Fergus 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.