10 Most Populated ZIP Codes in Montana

The top ZIP code for population in Montana is 59901 (Kalispell, Flathead County), with a population of 61,710. Across the top 10 most populated ZIP codes in Montana, population ranges from 61,710 to 31,127, covering communities from Kalispell to Bozeman.

Rank	ZIP	City	County	Population	Population
1	59901	Kalispell	Flathead County	61,710	61,710
2	59102	Billings	Yellowstone County	48,700	48,700
3	59718	Bozeman	Gallatin County	43,750	43,750
4	59101	Billings	Yellowstone County	41,797	41,797
5	59715	Bozeman	Gallatin County	39,275	39,275
6	59105	Billings	Yellowstone County	34,363	34,363
7	59701	Butte	Silver Bow County	34,245	34,245
8	59405	Great Falls	Cascade County	34,059	34,059
9	59601	Helena	Lewis and Clark County	31,822	31,822
10	59801	Missoula	Missoula County	31,127	31,127

Methodology

Rankings are derived from the U.S. Census Bureau American Community Survey 5-Year Estimates, vintage 2019 to 2023, joined to USPS ZIP Code Tabulation Areas. We rank by population and surface the top 10 ZIP codes within Montana. Values reflect ZCTA-level estimates and may differ slightly from city-level figures. Compiled and reviewed by the Zip Code Near Me Data Team.

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Reviewed by Zip Code Near Me Data Team. Last verified June 13, 2026.

10 Most Populated ZIP Codes in Montana

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