ZIP Code 59901 — Kalispell, MT
59901 is a standard (street delivery) ZIP code serving Kalispell, Montana, in Flathead 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 59901 at a glance
| ZIP code | 59901 |
|---|---|
| Primary city | Kalispell |
| State | Montana (MT) |
| County | Flathead FIPS 30029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 63,161 |
| Coordinates | 48.228730, -114.405640 |
How ZIP+4 works in 59901
The four digits after the hyphen encode a delivery segment inside 59901. 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 59901 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 59901.
| ZIP | City | Distance |
|---|---|---|
| 59920 | Kila, MT | 12.8 mi |
| 59932 | Somers, MT | 14.3 mi |
| 59937 | Whitefish, MT | 15.1 mi |
| 59922 | Lakeside, MT | 17.9 mi |
| 59912 | Columbia Falls, MT | 18.1 mi |
| 59919 | Hungry Horse, MT | 19.1 mi |
| 59926 | Martin City, MT | 20.6 mi |
| 59929 | Proctor, MT | 21.1 mi |
| 59931 | Rollins, MT | 22.3 mi |
| 59925 | Marion, MT | 23.2 mi |
| 59913 | Coram, MT | 24.5 mi |
| 59914 | Dayton, MT | 25.3 mi |
Questions about 59901
What is the ZIP+4 code for 59901?
59901 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 59901, you need to look up a specific street address to get them.
What city is 59901?
59901 is assigned to Kalispell, Montana, in Flathead 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.