Montana ZIP Codes: Ranges, Prefixes and Major Cities
Montana uses 404 active ZIP codes, running from 59001 to 59937. This guide shows how those codes are grouped, which ones serve the state's largest cities and how to format them correctly.
ZIP code range and prefixes
Every Montana ZIP code starts with one of 10 three-digit prefixes. Each prefix points to a sectional center facility, the processing plant that sorts mail for a group of nearby post offices.
- 590
- 591
- 592
- 593
- 594
- 595
- 596
- 597
- 598
- 599
Types of ZIP codes in Montana
| Type | Count | What it covers |
|---|---|---|
| Standard | 317 | Street delivery areas |
| PO Box | 76 | Post office boxes only |
| Unique | 11 | A single high-volume organization |
ZIP codes for major Montana cities
| City | County | Standard ZIPs | Range |
|---|---|---|---|
| Missoula | Missoula County | 5 | 59801–59808 |
| Billings | Yellowstone County | 4 | 59101–59106 |
| Great Falls | Cascade County | 3 | 59401–59405 |
| Helena | Lewis and Clark County | 3 | 59601–59626 |
| Bozeman | Gallatin County | 2 | 59715–59718 |
| Butte | Silver Bow County | 2 | 59701–59750 |
| Absarokee | Stillwater County | 1 | 59001–59001 |
| Acton | Yellowstone County | 1 | 59002–59002 |
| Alberton | Mineral County | 1 | 59820–59820 |
| Alzada | Carter County | 1 | 59311–59311 |
| Anaconda | Deer Lodge County | 1 | 59711–59711 |
| Angela | Garfield County | 1 | 59312–59312 |
| Antelope | Sheridan County | 1 | 59211–59211 |
| Arlee | Lake County | 1 | 59821–59821 |
| Ashland | Rosebud County | 1 | 59003–59003 |
Helena is the state capital. Larger cities have many ZIP codes because each code follows mail delivery routes, not city limits.
Sample addresses
Sarah Rivera
8976 Madison Blvd
Helena, MT 59602
Wei Chen
1302 Cedar Ave
Billings, MT 59102
Priya Taylor
1010 Center Pl
Billings, MT 59106
These examples use real city and ZIP pairs with invented street lines, so they are safe for testing and documentation.
Tips for working with these ZIP codes
- Store ZIP codes as text, not numbers, so the format stays consistent across states with leading zeros.
- All of Montana is in the Mountain time zone, which keeps scheduling logic simple.
- A quick sanity check: a valid MT ZIP code begins with one of the prefixes listed above.
- City names in addresses are post office names. A suburb may share a ZIP code and city name with a nearby larger town.
Create realistic Montana addresses for testing, with real cities, counties and ZIP codes.
Generate Montana addresses