ZIP Code 59860 — Polson, MT
59860 is a standard (street delivery) ZIP code serving Polson, Montana, in Lake 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 59860 at a glance
| ZIP code | 59860 |
|---|---|
| Primary city | Polson |
| State | Montana (MT) |
| County | Lake FIPS 30047 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 11,897 |
| Coordinates | 47.713140, -114.178320 |
How ZIP+4 works in 59860
The four digits after the hyphen encode a delivery segment inside 59860. 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 59860 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 59860.
| ZIP | City | Distance |
|---|---|---|
| 59910 | Big Arm, MT | 8.1 mi |
| 59855 | Pablo, MT | 8.3 mi |
| 59914 | Dayton, MT | 12 mi |
| 59864 | Ronan, MT | 12.7 mi |
| 59915 | Elmo, MT | 13.1 mi |
| 59931 | Rollins, MT | 14.8 mi |
| 59911 | Bigfork, MT | 17 mi |
| 59845 | Hot Springs, MT | 17.5 mi |
| 59929 | Proctor, MT | 17.9 mi |
| 59922 | Lakeside, MT | 19.9 mi |
| 59824 | Charlo, MT | 20.4 mi |
| 59848 | Lonepine, MT | 23.4 mi |
Questions about 59860
What is the ZIP+4 code for 59860?
59860 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 59860, you need to look up a specific street address to get them.
What city is 59860?
59860 is assigned to Polson, Montana, in Lake 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.