Ranking of Montana Counties By Population with Other Groups Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 181.26K people in Montana with Other Groups ancestry. Among all Montana counties, Yellowstone County had the highest population with Other Groups ancestry (28.77K), followed by Gallatin County (15.84K), and Missoula County (15.69K).

The chart and table below shows the top 10 counties with high number of people with Other Groups 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 Other Groups Ancestry in 2021
Yellowstone County
Gallatin County
Missoula County
Cascade County
Flathead County
Lewis and Clark County
Glacier County
Lake County
Big Horn County
Roosevelt County
Ranking of Montana Counties By Population with Other Groups Ancestry in 2021
0 of 0
Rank County Population
1 Yellowstone County 28769
2 Gallatin County 15840
3 Missoula County 15693
4 Cascade County 13986
5 Flathead County 12639
6 Lewis and Clark County 9437
7 Glacier County 9226
8 Lake County 9051
9 Big Horn County 8816
10 Roosevelt County 6815
11 Ravalli County 6034
12 Silver Bow County 4940
13 Hill County 3380
14 Rosebud County 3335
15 Blaine County 3322
16 Lincoln County 3133
17 Park County 1922
18 Sanders County 1529
19 Jefferson County 1525
20 Custer County 1444
21 Beaverhead County 1394
22 Deer Lodge County 1304
23 Richland County 1225
24 Stillwater County 1205
25 Powell County 1200
26 Madison County 1167
27 Pondera County 1144
28 Carbon County 1067
29 Chouteau County 1064
30 Valley County 1015
31 Dawson County 963
32 Fergus County 942
33 Toole County 883
34 Broadwater County 877
35 Phillips County 804
36 Musselshell County 534
37 Teton County 489
38 Mineral County 421
39 Sheridan County 354
40 Granite County 269
41 Sweet Grass County 264
42 Fallon County 255
43 McCone County 224
44 Powder River County 214
45 Wheatland County 170
46 Meagher County 153
47 Judith Basin County 152
48 Prairie County 149
48 Wibaux County 149
49 Daniels County 100
50 Golden Valley County 80
51 Liberty County 72
52 Petroleum County 50
53 Carter County 29
54 Treasure County 28
55 Garfield County 14