How to use this list
Counties are sorted alphabetically. Use ZIP count and population to spot larger counties, then open a county for its ZIP roster and income/housing averages.
Montana counties
56 counties · 369 ZIP codes · population 1,105,740 . Select a county to open its ZIP table and local summary.
Related pages
Also see the Montana overview, cities, rankings, and congressional districts.
| County | ZIP codes | Population | Avg. income |
|---|---|---|---|
| Beaverhead County | 8 | 9,560 | $62,250 |
| Big Horn County | 11 | 12,290 | $68,494 |
| Blaine County | 7 | 6,589 | $60,894 |
| Broadwater County | 3 | 5,475 | $55,578 |
| Carbon County | 10 | 10,485 | $80,729 |
| Carter County | 4 | 1,079 | $49,407 |
| Cascade County | 15 | 84,505 | $73,507 |
| Chouteau County | 7 | 5,029 | $70,507 |
| Custer County | 4 | 11,997 | $77,161 |
| Daniels County | 4 | 1,510 | $96,407 |
| Dawson County | 4 | 8,846 | $76,243 |
| Deer Lodge County | 3 | 9,964 | $53,295 |
| Fallon County | 3 | 2,882 | $69,729 |
| Fergus County | 9 | 11,600 | $60,207 |
| Flathead County | 14 | 102,179 | $66,736 |
| Gallatin County | 8 | 122,208 | $81,181 |
| Garfield County | 6 | 937 | $58,611 |
| Glacier County | 4 | 13,743 | $52,622 |
| Golden Valley County | 2 | 906 | $62,697 |
| Granite County | 4 | 5,191 | $60,656 |
| Hill County | 7 | 17,242 | $65,463 |
| Jefferson County | 6 | 12,837 | $74,762 |
| Judith Basin County | 6 | 2,035 | $56,012 |
| Lake County | 12 | 36,017 | $75,316 |
| Lewis and Clark County | 11 | 73,239 | $68,030 |
| Liberty County | 5 | 2,070 | $46,704 |
| Lincoln County | 7 | 20,656 | $61,019 |
| Madison County | 12 | 9,671 | $68,224 |
| McCone County | 4 | 1,400 | $98,832 |
| Meagher County | 3 | 2,005 | $59,231 |
| Mineral County | 6 | 5,795 | $65,068 |
| Missoula County | 14 | 118,275 | $72,749 |
| Musselshell County | 2 | 4,791 | $48,459 |
| Park County | 9 | 17,241 | $89,663 |
| Petroleum County | 1 | 348 | $60,625 |
| Phillips County | 6 | 4,606 | $69,748 |
| Pondera County | 5 | 6,143 | $57,947 |
| Powder River County | 7 | 2,847 | $55,072 |
| Powell County | 7 | 7,160 | $70,390 |
| Prairie County | 2 | 1,255 | $49,844 |
| Ravalli County | 9 | 46,715 | $69,532 |
| Richland County | 5 | 11,912 | $71,912 |
| Roosevelt County | 6 | 11,337 | $65,557 |
| Rosebud County | 9 | 8,052 | $63,220 |
| Sanders County | 9 | 12,859 | $48,819 |
| Sheridan County | 10 | 3,727 | $85,802 |
| Silver Bow County | 4 | 35,306 | $73,961 |
| Stillwater County | 8 | 9,882 | $77,807 |
| Sweet Grass County | 4 | 3,559 | $83,148 |
| Teton County | 6 | 6,384 | $62,085 |
| Toole County | 7 | 4,852 | $54,168 |
| Treasure County | 3 | 898 | $87,413 |
| Valley County | 10 | 7,409 | $62,139 |
| Wheatland County | 4 | 2,069 | $48,399 |
| Wibaux County | 1 | 1,164 | $65,250 |
| Yellowstone County | 12 | 167,007 | $73,376 |
Frequently asked questions
- How many counties are listed for Montana?
- US5 currently lists 56 counties with published ZIP coverage in Montana. Counts can change as geography publishes update.
- What happens when I open a county?
- Each county page shows ZIP totals, income and housing averages, and a ZIP table. From there you can open any ZIP for a full demographics dashboard.