ZIP codes

ZIP codes in Montana by county

Montana has 373 ZIP codes in its 56 counties. 121 of them cross a county line and 8 cross into a neighboring state. Big Horn County has the most, 18.

By the All Map Tools Team

ZIP codes: 373; With 1% or more of their land in the state
Counties: 56; 3 with a page of their own below
Cross a county line: 121; 1% or more of their land in another county
Cross a state line: 8; 1% or more of their land in another state
County with the most: 18; Big Horn County
Most populated ZIP: 59901; 63,161 people · Kalispell

ZIP codes per county in Montana

2–6
7–9
10–12
13–18

Open in the interactive tool

Counties and their ZIP codes

County	Population (2025)	ZIP codes	Shared
Beaverhead County	10,043	10	5
Big Horn County	12,752	18	8
Blaine County	6,860	10	5
Broadwater County	8,493	6	3
Carbon County	11,466	13	4
Carter County	1,383	10	6
Cascade County	85,029	17	9
Chouteau County	5,865	13	8
Custer County	12,034	7	6
Daniels County	1,612	5	4
Dawson County	8,692	8	7
Deer Lodge County	9,709	5	4
Fallon County	2,959	5	4
Fergus County	11,825	11	6
Flathead County	115,429	16	3
Gallatin County	128,740	10	5
Garfield County	1,148	9	4
Glacier County	13,463	4	1
Golden Valley County	844	3	3
Granite County	3,658	5	2
Hill County	16,167	9	5
Jefferson County	13,329	9	5
Judith Basin County	2,162	12	8
Lake County	33,392	15	4
Lewis and Clark County	75,331	12	3
Liberty County	1,957	7	5
Lincoln County	22,328	7	0
Madison County	10,026	18	7
McCone County	1,720	6	5
Meagher County	2,137	4	3
Mineral County	5,185	6	2
Missoula County	123,513	17	6
Musselshell County	5,582	5	4
Park County	18,214	11	4
Petroleum County	548	4	3
Phillips County	4,203	7	3
Pondera County	6,072	6	4
Powder River County	1,781	9	6
Powell County	7,157	8	2
Prairie County	1,112	6	6
Ravalli County	48,582	9	1
Richland County	11,377	9	7
Roosevelt County	10,242	10	9
Rosebud County	8,253	12	6
Sanders County	14,062	11	3
Sheridan County	3,436	11	4
Silver Bow County	36,118	7	5
Stillwater County	9,445	10	6
Sweet Grass County	3,762	7	4
Teton County	6,496	12	7
Toole County	5,211	10	4
Treasure County	728	3	2
Valley County	7,385	13	4
Wheatland County	2,100	6	4
Wibaux County	885	2	2
Yellowstone County	172,692	15	8

Every ZIP code in Montana, by county

A ZIP code that crosses a county line appears in each county it has 1% or more of its land in.

Beaverhead County (10): 59724, 59725, 59727, 59732, 59736, 59739, 59743, 59746, 59761, 59762
Big Horn County (18): 59010, 59016, 59022, 59024, 59025, 59031, 59034, 59035, 59037, 59038, 59043, 59050, 59064, 59066, 59075, 59089, 59101, 82801
Blaine County (10): 59501, 59520, 59523, 59524, 59526, 59527, 59529, 59535, 59542, 59547
Broadwater County (6): 59635, 59643, 59644, 59645, 59647, 59752
Carbon County (13): 59001, 59007, 59008, 59013, 59014, 59019, 59026, 59029, 59041, 59044, 59068, 59070, 59071
Carter County (10): 57717, 57724, 59311, 59313, 59316, 59319, 59324, 59332, 59336, 59344
Cascade County (17): 59401, 59404, 59405, 59412, 59414, 59421, 59440, 59443, 59463, 59465, 59468, 59472, 59477, 59480, 59483, 59485, 59487
Chouteau County (13): 59404, 59405, 59416, 59420, 59440, 59442, 59446, 59447, 59450, 59460, 59520, 59521, 59540
Custer County (7): 59301, 59336, 59338, 59345, 59347, 59349, 59351
Daniels County (5): 59222, 59253, 59260, 59263, 59276
Dawson County (8): 59215, 59259, 59262, 59315, 59326, 59330, 59339, 59353
Deer Lodge County (5): 59701, 59711, 59722, 59756, 59762
Fallon County (5): 59313, 59336, 59344, 59353, 59354
Fergus County (11): 59032, 59418, 59424, 59430, 59441, 59451, 59453, 59457, 59464, 59471, 59489
Flathead County (16): 59845, 59901, 59911, 59912, 59913, 59916, 59919, 59920, 59922, 59925, 59926, 59927, 59928, 59932, 59936, 59937
Gallatin County (10): 59086, 59714, 59715, 59716, 59718, 59730, 59741, 59752, 59758, 59760
Garfield County (9): 59058, 59077, 59214, 59223, 59301, 59312, 59318, 59322, 59337
Glacier County (4): 59411, 59417, 59427, 59434
Golden Valley County (3): 59046, 59074, 59078
Granite County (5): 59711, 59825, 59832, 59837, 59858
Hill County (9): 59501, 59521, 59523, 59525, 59528, 59530, 59531, 59532, 59540
Jefferson County (9): 59631, 59632, 59634, 59635, 59638, 59701, 59721, 59752, 59759
Judith Basin County (12): 59412, 59418, 59424, 59430, 59447, 59452, 59453, 59462, 59463, 59464, 59469, 59479
Lake County (15): 59821, 59824, 59845, 59855, 59860, 59863, 59864, 59865, 59910, 59911, 59914, 59915, 59922, 59929, 59931
Lewis and Clark County (12): 59410, 59421, 59601, 59602, 59623, 59625, 59633, 59635, 59636, 59639, 59640, 59648
Liberty County (7): 59416, 59444, 59456, 59461, 59522, 59531, 59545
Lincoln County (7): 59917, 59918, 59923, 59930, 59933, 59934, 59935
Madison County (18): 59710, 59716, 59720, 59721, 59725, 59729, 59730, 59732, 59735, 59740, 59743, 59745, 59747, 59749, 59751, 59754, 59755, 59759
McCone County (6): 59201, 59214, 59215, 59223, 59255, 59274
Meagher County (4): 59053, 59086, 59642, 59645
Mineral County (6): 59820, 59830, 59842, 59866, 59867, 59872
Missoula County (17): 59801, 59802, 59803, 59804, 59808, 59812, 59820, 59821, 59823, 59825, 59826, 59833, 59834, 59846, 59847, 59851, 59868
Musselshell County (5): 59015, 59046, 59054, 59059, 59072
Park County (11): 59018, 59020, 59027, 59030, 59047, 59052, 59065, 59081, 59082, 59086, 59715
Petroleum County (4): 59032, 59058, 59072, 59087
Phillips County (7): 59261, 59524, 59537, 59538, 59542, 59544, 59546
Pondera County (6): 59416, 59425, 59432, 59448, 59456, 59486
Powder River County (9): 59003, 59062, 59301, 59314, 59316, 59317, 59343, 59345, 59351
Powell County (8): 59713, 59722, 59728, 59731, 59733, 59843, 59854, 59868
Prairie County (6): 59214, 59301, 59326, 59330, 59339, 59349
Ravalli County (9): 59827, 59828, 59829, 59833, 59840, 59841, 59870, 59871, 59875
Richland County (9): 59213, 59217, 59218, 59221, 59243, 59255, 59259, 59262, 59270
Roosevelt County (10): 59201, 59212, 59213, 59218, 59222, 59226, 59242, 59255, 59258, 59263
Rosebud County (12): 59003, 59012, 59039, 59043, 59054, 59062, 59083, 59301, 59323, 59327, 59333, 59347
Sanders County (11): 59821, 59831, 59844, 59845, 59848, 59853, 59856, 59859, 59866, 59873, 59874
Sheridan County (11): 59211, 59219, 59226, 59242, 59247, 59252, 59254, 59256, 59257, 59258, 59275
Silver Bow County (7): 59701, 59711, 59727, 59743, 59748, 59750, 59759
Stillwater County (10): 59001, 59015, 59019, 59028, 59057, 59061, 59063, 59067, 59069, 59074
Sweet Grass County (7): 59011, 59033, 59052, 59055, 59069, 59078, 59082
Teton County (12): 59410, 59416, 59419, 59422, 59425, 59432, 59433, 59436, 59443, 59467, 59468, 59487
Toole County (10): 59427, 59435, 59444, 59454, 59456, 59466, 59474, 59482, 59484, 59545
Treasure County (3): 59010, 59038, 59076
Valley County (13): 59201, 59225, 59230, 59231, 59240, 59241, 59244, 59248, 59250, 59253, 59260, 59261, 59273
Wheatland County (6): 59036, 59053, 59074, 59078, 59085, 59453
Wibaux County (2): 58621, 59353
Yellowstone County (15): 59002, 59006, 59015, 59024, 59037, 59041, 59044, 59057, 59064, 59079, 59088, 59101, 59102, 59105, 59106

Neighboring states

Tools for Montana

ZIP codes by county or city Any county or city in Montana on an interactive map, with CSV US county map Its counties shaded by population, income or your own data Elevation and places of Montana Its capital, its cities and its highest point, with their elevation

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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