ZIP Code 59477 — Simms, MT
59477 is a standard (street delivery) ZIP code serving Simms, Montana, in Cascade 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 59477 at a glance
| ZIP code | 59477 |
|---|---|
| Primary city | Simms |
| State | Montana (MT) |
| County | Cascade FIPS 30013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 334 |
| Coordinates | 47.444670, -111.974190 |
How ZIP+4 works in 59477
The four digits after the hyphen encode a delivery segment inside 59477. 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 59477 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 59477.
| ZIP | City | Distance |
|---|---|---|
| 59443 | Fort Shaw, MT | 10.6 mi |
| 59483 | Sun River, MT | 11.9 mi |
| 59436 | Fairfield, MT | 12.9 mi |
| 59487 | Vaughn, MT | 18.1 mi |
| 59485 | Ulm, MT | 19 mi |
| 59421 | Cascade, MT | 20.5 mi |
| 59468 | Power, MT | 24.5 mi |
| 59648 | Wolf Creek, MT | 26.8 mi |
| 59433 | Dutton, MT | 33.9 mi |
| 59422 | Choteau, MT | 36.1 mi |
Questions about 59477
What is the ZIP+4 code for 59477?
59477 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 59477, you need to look up a specific street address to get them.
What city is 59477?
59477 is assigned to Simms, Montana, in Cascade 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.