RANKING · 2024 ACS · 26 SHOWN OF 26

Highest Australian population share, Iowa counties

Iowa 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 26 counties in Iowa that qualify, ranked against each other statewide. The median across all 26 is 0.0%. Biggest climber in the top 100 since 2020: Scott County, IA, up 12 places to #13.

Australian Americans: full group profile →

IowaAll states All rankings

SAME RANKING BYCities States Metros

RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

Highest Australian population share by state

RANKPLACESTATEPOPAUSTRALIAN SHAREVS 2010

01Marion County, IAIA34,1920.1%+0.1 pts

02Des Moines County, IAIA38,0770.1%+0.1 pts

03Marshall County, IAIA39,8900.1%–

04▲9Clay County, IAIA16,2020.1%+0.1 pts

05▼4Mitchell County, IAIA10,6500.1%–

06▲4Poweshiek County, IAIA18,3680.1%0.0 pts

07Plymouth County, IAIA25,6970.1%–

08▼2Decatur County, IAIA7,6550.1%0.0 pts

09O'Brien County, IAIA14,2200.1%−0.5 pts

10▼1Muscatine County, IAIA41,8530.1%–

11Franklin County, IAIA9,8680.1%−0.1 pts

12▲10Pottawattamie County, IAIA92,9960.0%0.0 pts

13▲12Scott County, IAIA175,2590.0%0.0 pts

14▲2Jasper County, IAIA38,1530.0%–

15Grundy County, IAIA12,3610.0%–

16▲8Henry County, IAIA19,3490.0%0.0 pts

17Dubuque County, IAIA99,3810.0%–

18Wapello County, IAIA35,2100.0%0.0 pts

19Boone County, IAIA26,7990.0%–

20▼8Johnson County, IAIA160,0440.0%0.0 pts

21▼2Polk County, IAIA516,5460.0%0.0 pts

22Winnebago County, IAIA10,2510.0%–

23▼3Story County, IAIA101,2910.0%0.0 pts

24Washington County, IAIA22,6670.0%–

25Mills County, IAIA14,7930.0%–

26Linn County, IAIA232,0280.0%0.0 pts

SHOWING 1–26 OF 26

Download CSV (full list, 26 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES