Montana County Codes

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These codes first appeared in the mid-30s and remain in use today.

County Code #: County (County Seat)

1: Silver Bow (Butte)
2: Cascade (Great Falls)
3: Yellowstone (Billings)
4: Missoula (Missoula)
5: Lewis & Clark (Helena)
6: Gallatin (Bozeman)
7: Flathead (Kalispell)
8: Fergus (Lewistown)
9: Powder River (Broadus)
10: Carbon (Red Lodge)
11: Phillips (Malta)
12: Hill (Havre)
13: Ravalli (Hamilton)
14: Custer (Miles City)
15: Lake (Polson)
16: Dawson (Glendive)
17: Roosevelt (Wolf Point)
18: Beaverhead (Dillon)
19: Chouteau (Fort Benton)
20: Valley (Glasgow)
21: Toole (Shelby)
22: Big Horn (Hardin)
23: Musselshell (Roundup)
24: Blaine (Chinook)
25: Madison (Virginia City)
26: Pondera (Conrad)
27: Richland (Sidney)
28: Powell (Deer Lodge)
29: Rosebud (Forsyth)
30: Deer Lodge (Anaoonda)
31: Teton (Choteau)
32: Stillwater (Columbus)
33: Treasure (Hysham)
34: Sheridan (Plentywood)
35: Sanders (Thompson Falls)
36: Judith Basin (Stanford)
37: Daniels (Scobey)
38: Glacier (Cut Bank)
39: Fallon (Baker)
40: Sweet Grass (Big Timber)
41: McCone (Circle)
42: Carter (Ekalaka)
43: Broadwater (Townsend)
44: Wheatland (Harlowtown)
45: Prairie (Terry)
46: Granite (Philipsburg)
47: Meagher (White Sulphur Springs)
48: Liberty (Chester)
49: Park (Livingston)
50: Garfield (Jordan)
51: Jefferson (Boulder)
52: Wibaux (Wibaux)
53: Golden Valley (Ryegate)
54: Mineral (Superior)
55: Petroleum (Winnett)
56: Lincoln (Libby)

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© Copyright 1998-2017 David Nicholson. All Rights Reserved.

Last Modified 2/8/1999.