Ranking of Montana Counties By Population with British Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 6.53K people in Montana with British ancestry. Among all Montana counties, Gallatin County had the highest population with British ancestry (962), followed by Missoula County (868), and Lewis and Clark County (684).

The chart and table below shows the top 10 counties with high number of people with British ancestry.

You can see similar information for other states and for other ancestry groups in Montana.

Data Source: US Census Bureau.
Ranking of Montana Counties By Population with British Ancestry in 2021
Gallatin County
Missoula County
Lewis and Clark County
Yellowstone County
Cascade County
Flathead County
Ravalli County
Lake County
Silver Bow County
Fergus County
Ranking of Montana Counties By Population with British Ancestry in 2021
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Rank County Population
1 Gallatin County 962
2 Missoula County 868
3 Lewis and Clark County 684
4 Yellowstone County 611
5 Cascade County 513
6 Flathead County 486
7 Ravalli County 441
8 Lake County 208
9 Silver Bow County 155
10 Fergus County 130
11 Richland County 123
12 Park County 113
13 Jefferson County 107
14 Broadwater County 93
15 Sanders County 79
16 Glacier County 78
17 Carbon County 74
18 Powell County 66
19 Deer Lodge County 60
20 Madison County 56
21 Granite County 52
21 Mineral County 52
21 Stillwater County 52
22 Custer County 49
23 Hill County 47
23 Lincoln County 47
24 Beaverhead County 46
25 Teton County 38
26 Chouteau County 28
26 Musselshell County 28
26 Sheridan County 28
27 Sweet Grass County 26
28 Pondera County 19
29 Phillips County 15
30 Toole County 14
31 Dawson County 12
31 Judith Basin County 12
32 Blaine County 10
33 Garfield County 9
34 Big Horn County 6
34 Carter County 6
34 Prairie County 6
35 Meagher County 5
35 Valley County 5
36 Liberty County 4
36 McCone County 4
37 Roosevelt County 2
38 Golden Valley County 1