Ranking of California Counties By Percentage of Population with Australian Ancestry in 2021

Based on the US Census ACS-5Yrs estimates, in 2021, there were 20.23K people in California with Australian ancestry (0.05% of California population). Among all California counties, Amador County had the highest percentage of its population with Australian ancestry (0.17%), followed by Marin County (0.17%), and Tehama County (0.17%).

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

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