Ranking of Montana Cities and Places By Percentage of Population with Irish Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 146.23K people in Montana with Irish ancestry (13.57% of Montana population). Among all Montana cities and places with a population of at least 10K, Butte-Silver Bow (balance) had the highest percentage of its population with Irish ancestry (24.22%), followed by Helena city (17.70%), and Missoula city (16.36%).

The chart and table below shows the top 8 cities with high percentage of its population having Irish ancestry.

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

Data Source: US Census Bureau.
Ranking of Montana Cities and Places By Percentage of Population with Irish Ancestry in 2021
Butte-Silver Bow (balance)
Helena city
Missoula city
Belgrade city
Kalispell city
Bozeman city
Great Falls city
Billings city
Ranking of Montana Cities and Places By Percentage of Population with Irish Ancestry in 2021
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Rank Ciy or Place Percentage of Pop. (%)
1 Butte-Silver Bow (balance) 24.22
2 Helena city 17.70
3 Missoula city 16.36
4 Belgrade city 15.14
5 Kalispell city 14.67
6 Bozeman city 13.94
7 Great Falls city 12.34
8 Billings city 12.05