Ranking of Montana Counties By Percentage of Population with Celtic Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 220 people in Montana with Celtic ancestry (0.02% of Montana population). Among all Montana counties, Sanders County had the highest percentage of its population with Celtic ancestry (0.17%), followed by Ravalli County (0.09%), and Mineral County (0.07%).

The chart and table below shows the top 10 counties with high percentage of its population having Celtic 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 Percentage of Population with Celtic Ancestry in 2021
Sanders County
Ravalli County
Mineral County
Lewis and Clark County
Madison County
Lake County
Silver Bow County
Flathead County
Powell County
Park County
Ranking of Montana Counties By Percentage of Population with Celtic Ancestry in 2021
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Rank County Percentage of Pop. (%)
1 Sanders County 0.17
2 Ravalli County 0.09
3 Mineral County 0.07
4 Lewis and Clark County 0.06
5 Madison County 0.05
6 Lake County 0.04
6 Silver Bow County 0.04
7 Flathead County 0.03
7 Powell County 0.03
8 Park County 0.02
9 Carbon County 0.01
9 Cascade County 0.01
9 Gallatin County 0.01
9 Missoula County 0.01
9 Yellowstone County 0.01