German is the biggest ancestry in Montana, claimed by over 28% of residents. Here is a list of the state's 25 largest ancestry groups:
|
Rank
|
Ancestry
|
Montana Estimated Population
|
Percentage of Total Population
|
|
|
Total:
|
990,898
|
100.0%
|
|
1
|
German
|
283,255
|
28.6%
|
|
2
|
Irish
|
150,609
|
15.2%
|
|
3
|
English
|
125,166
|
12.6%
|
|
4
|
Norwegian
|
90,371
|
9.1%
|
|
5
|
American
|
67,408
|
6.8%
|
|
6
|
French
(except Basque)
|
40,335
|
4.1%
|
|
7
|
Italian
|
34,428
|
3.5%
|
|
8
|
Swedish
|
31,048
|
3.1%
|
|
9
|
Scottish
|
30,760
|
3.1%
|
|
10
|
Dutch
|
26,181
|
2.6%
|
|
11
|
Polish
|
25,220
|
2.5%
|
|
12
|
Scotch-Irish
|
18,097
|
1.8%
|
|
13
|
European
|
15,405
|
1.6%
|
|
14
|
Danish
|
12,986
|
1.3%
|
|
15
|
Russian
|
10,411
|
1.1%
|
|
16
|
French
Canadian
|
9,767
|
1.0%
|
|
17
|
Welsh
|
9,123
|
0.9%
|
|
18
|
Czech
|
8,419
|
0.8%
|
|
19
|
Swiss
|
6,473
|
0.7%
|
|
20
|
Greek
|
4,854
|
0.5%
|
|
21
|
British
|
3,691
|
0.4%
|
|
22
|
Hungarian
|
2,648
|
0.3%
|
|
23
|
Ukrainian
|
2,333
|
0.2%
|
|
24
|
Lithuanian
|
2,224
|
0.2%
|
|
25
|
Arab
|
1,916
|
0.2%
|
Source: U.S. Census Bureau, 2010 American Community Survey
C04006 People Reporting Ancestry, 1 year estimates