County Number  on License Plate

County Seat

County name

1

Butte

Silver Bow

2

Great Falls

Cascade

3

Billings

Yellowstone

4

Missoula

Missoula

5

Helena

Lewis & Clark

6

Bozeman

Gallatin

7

Kalispell

Flathead

8

Lewistown

Fergus

9

Broadus

Powder River

10

Red Lodge

Carbon

11

Malta

Phillips

12

Havre

Hill

13

Hamilton

Ravalli

14

Miles City

Custer

15

Polson

Lake

16

Glendive

Dawson

17

Wolf Point

Roosevelt

18

Dillon

Beaverhead

19

Ft. Benton

Chouteau

20

Glasgow

Valley

21

Shelby

Toole

22

Hardin

Big Horn

23

Roundup

Musselshell

24

Chinook

Blaine

25

Virginia City

Madison

26

Conrad

Pondera

27

Sidney

Richland

28

Deer Lodge

Powell

29

Forsyth

Rosebud

30

Anaconda

Deer Lodge

31

Choteau

Teton

32

Columbus

Stillwater

33

Hysham

Treasure

34

Plentywood

Sheridan

35

Thompson Falls

Sanders

36

Stanford

Judith Basin

37

Scobey

Daniels

38

Cut Bank

Glacier

39

Baker

Fallon

40

Big Timber

Sweet Grass

41

Circle

McCone

42

Ekalaka

Carter

43

Townsend

Broadwater

44

Harlowton

Wheatland

45

Terry

Prairie

46

Philipsburg

Granite

47

White Sulphur Springs

Meagher

48

Chester

Liberty

49

Livingston

Park

50

Jordan

Garfield

51

Boulder

Jefferson

52

Wibaux

Wibaux

53

Ryegate

Golden Valley

54

Superior

Mineral

55

Winnett

Petroleum

56

Libby

Lincoln