ZIP Code 59218 — Culbertson, MT
59218 is a standard (street delivery) ZIP code serving Culbertson, Montana, in Roosevelt 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 59218 at a glance
| ZIP code | 59218 |
|---|---|
| Primary city | Culbertson |
| State | Montana (MT) |
| County | Roosevelt FIPS 30085 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 898 |
| Coordinates | 48.099930, -104.523610 |
How ZIP+4 works in 59218
The four digits after the hyphen encode a delivery segment inside 59218. 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 59218 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 59218.
| ZIP | City | Distance |
|---|---|---|
| 59213 | Brockton, MT | 16.2 mi |
| 59226 | Froid, MT | 16.8 mi |
| 59212 | Bainville, MT | 17.5 mi |
| 59221 | Fairview, MT | 20.1 mi |
| 59242 | Homestead, MT | 23.4 mi |
| 59243 | Lambert, MT | 24.4 mi |
| 59247 | Medicine Lake, MT | 28.9 mi |
| 59258 | Reserve, MT | 33.9 mi |
| 59219 | Dagmar, MT | 35.9 mi |
| 59259 | Richey, MT | 38.2 mi |
Questions about 59218
What is the ZIP+4 code for 59218?
59218 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 59218, you need to look up a specific street address to get them.
What city is 59218?
59218 is assigned to Culbertson, Montana, in Roosevelt 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.