ZIP Code 59632 — Boulder, MT
59632 is a standard (street delivery) ZIP code serving Boulder, Montana, in Jefferson 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 59632 at a glance
| ZIP code | 59632 |
|---|---|
| Primary city | Boulder |
| State | Montana (MT) |
| County | Jefferson FIPS 30043 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 2,557 |
| Coordinates | 46.165220, -111.999180 |
How ZIP+4 works in 59632
The four digits after the hyphen encode a delivery segment inside 59632. 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 59632 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 59632.
| ZIP | City | Distance |
|---|---|---|
| 59638 | Jefferson City, MT | 13.4 mi |
| 59634 | Clancy, MT | 18.7 mi |
| 59643 | Toston, MT | 20.2 mi |
| 59631 | Basin, MT | 20.5 mi |
| 59721 | Cardwell, MT | 22.3 mi |
| 59759 | Whitehall, MT | 23.8 mi |
| 59701 | Butte, MT | 23.8 mi |
| 59647 | Winston, MT | 26.7 mi |
| 59601 | Helena, MT | 27.3 mi |
| 59752 | Three Forks, MT | 28.1 mi |
| 59635 | East Helena, MT | 28.2 mi |
| 59623 | Helena, MT | 29.4 mi |
Questions about 59632
What is the ZIP+4 code for 59632?
59632 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 59632, you need to look up a specific street address to get them.
What city is 59632?
59632 is assigned to Boulder, Montana, in Jefferson 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.