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

Based on the US Census ACS-5Yrs estimates, in 2021, there were 2.01K people in Montana with Portuguese ancestry (0.19% of Montana population). Among all Montana counties, Madison County had the highest percentage of its population with Portuguese ancestry (1.39%), followed by Teton County (0.96%), and Treasure County (0.72%).

The chart and table below shows the top 10 counties with high percentage of its population having Portuguese ancestry.

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