ZIP Code 59436 — Fairfield, MT
59436 is a standard (street delivery) ZIP code serving Fairfield, Montana, in Teton 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 59436 at a glance
| ZIP code | 59436 |
|---|---|
| Primary city | Fairfield |
| State | Montana (MT) |
| County | Teton FIPS 30099 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 2,039 |
| Coordinates | 47.613500, -112.090700 |
How ZIP+4 works in 59436
The four digits after the hyphen encode a delivery segment inside 59436. 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 59436 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 59436.
| ZIP | City | Distance |
|---|---|---|
| 59477 | Simms, MT | 12.8 mi |
| 59443 | Fort Shaw, MT | 12.8 mi |
| 59483 | Sun River, MT | 19.7 mi |
| 59487 | Vaughn, MT | 20.8 mi |
| 59468 | Power, MT | 22.6 mi |
| 59422 | Choteau, MT | 24 mi |
| 59410 | Augusta, MT | 27 mi |
| 59433 | Dutton, MT | 27.1 mi |
| 59485 | Ulm, MT | 27.4 mi |
| 59419 | Bynum, MT | 30.9 mi |
| 59421 | Cascade, MT | 33.2 mi |
| 59467 | Pendroy, MT | 34.3 mi |
Questions about 59436
What is the ZIP+4 code for 59436?
59436 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 59436, you need to look up a specific street address to get them.
What city is 59436?
59436 is assigned to Fairfield, Montana, in Teton 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.