Highest Australian population share, Illinois counties

Illinois 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 28 counties in Illinois that qualify, ranked against each other statewide. The median across all 28 is 0.0%. Biggest climber in the top 100 since 2020: McLean County, IL, up 21 places to #15.