Highest Australian population share, Montana counties

Montana counties ranked by the share of all residents who are Australian ancestry (2024 American Community Survey). A concentration measure: Australian residents as a percentage of total population. This list covers the 15 counties in Montana that qualify, ranked against each other statewide. The median across all 15 is 0.1%. Biggest climber in the top 100 since 2020: Gallatin County, MT, up 5 places to #3.