Ranking of Montana Counties By 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. Among all Montana counties, Lewis and Clark County had the highest population with Celtic ancestry (45), followed by Ravalli County (39), and Flathead County (29).

The chart and table below shows the top 10 counties with high number of people with 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 Population with Celtic Ancestry in 2021
Lewis and Clark County
Ravalli County
Flathead County
Sanders County
Missoula County
Silver Bow County
Yellowstone County
Gallatin County
Lake County
Cascade County
Ranking of Montana Counties By Population with Celtic Ancestry in 2021
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Rank County Population
1 Lewis and Clark County 45
2 Ravalli County 39
3 Flathead County 29
4 Sanders County 21
5 Missoula County 15
6 Silver Bow County 14
6 Yellowstone County 14
7 Gallatin County 13
8 Lake County 12
9 Cascade County 5
10 Madison County 4
11 Mineral County 3
11 Park County 3
12 Powell County 2
13 Carbon County 1